Southampton remain in the hunt for a Champions League place after a 1-1 draw at Chelsea.
Dusan Tadic equalized from the penalty spot after Diego Costa gave Chelsea the lead at Stamford Bridge.
The result has moved Southampton up to sixth position in the Premier League, three points behind fourth place Manchester United who play later against Tottenham Hotspur.
Southampton are third in the Premier League after a late winner at Queens Park Rangers.
Sadio Mane fired a powerful shot into the top corner in the 93rd-minute in a 1-0 win at Loftus Road.
The result means Ronald Koeman's side remain in the Champions League qualifying position, despite last week's disappointing home defeat against Swansea.
It's being reported that Sunderland’s players will look to reimburse the 2,456 supporters who travelled to Southampton to watch them get thrashed 8-0
Sunderland goalkeeper Vito Mannone said he would ask his team-mates to agree to the gesture.
According to The Chronicle Mannone thinks the team owes the fans.
He said: “We should do it because we didn’t put our foot (down), we didn’t work hard."
Ronald Koeman well and truly disproved the manager of the month award as his Southampton side decimated a woeful Sunderland outfit 8-0.
There is a longheld theory that the boss who collects the monthly accolade slips to defeat in the next game but Saints returned to winning ways with their biggest ever Barclays Premier League win as Graziano Pelle scored twice to seal a memorable week on a personal level.
A goal in either half saw Pelle move onto six Barclays Premier League goals for the season and add to his match-winning Italy debut and player of the month award.
The former Feyenoord striker would have been proud of Vergini's own goal, which opened the floodgates as Southampton inflicted a damaging defeat on Gus Poyet's side.
Sunderland had started the game brightly as they looked to build on their maiden league win against Stoke before the international break but Vergini scored a clinical own goal from the edge of his box to set Southampton on their way to a stunning victory.
Pelle then scored with a tap-in with Jack Cork, brought into midfield in place of Victor Wanyama, killing the game off before the break.
Sunderland then shipped four goals in 16 second-half minutes as a another own goal, courtesy of Liam Bridcutt, was added to by Pelle's second and efforts from Dusan Tadic and Wanyama.
Sadio Mane had been rested following international exertions but came on to add the eighth late on, leaving some Sunderland fans in tears.
Saints may boast the player of the month in Italian striker Pelle but they also have the best defence in English football having conceded a measly five league goals this season.
Sunderland's defence is not as watertight and it starting leaking goals after just 11 minutes as Morgan Schneiderlin eased past Wes Brown, with the ball falling to the edge of the Sunderland box, where Argentina international Vergini thrashed the ball into the corner of his own goal with deadly accuracy.
It did not take the hosts long to double their lead as Steve Davis was released down the left and crossed for Pelle to tap home from close range to continue his impressive form.
Shellshocked Sunderland looked like they might peg their hosts back immediately but goalkeeper Fraser Forster was equal to a well-struck Sebastian Larsson free-kick.
Poyet was left angered when his side were denied what appeared to be a clear penalty as Forster cleaned out Steven Fletcher after the Scotland forward had latched onto Lee Cattermole's through ball - but referee Andre Marriner simply signalled for a goal-kick.
The Uruguayan's mood was not helped as Southampton added their third from the very next attack. Tadic crossed from the left and picked out an unmarked Cork, who got enough on his shot to force it past Vito Mannone.
Pelle should have done better with a chance on the stroke of half-time but cut his effort well wide of goal as Saints continued to dominate.
Southampton came close to extending their lead early in the second half as Shane Long squared to Tadic inside the box, but the Serbia winger saw his shot cleared off the line by Patrick van Aanholt.
The fourth goal duly arrived and it once again came courtesy of a Sunderland own goal as Mannone got a strong hand to a low Pelle shot, only for the ball to squirm over the line off half-time substitute Bridcutt.
The misery continued for Poyet and his players as Pelle soon made it five, slotting home first time having been played in by Tadic - although he did balloon a hat-trick opportunity high and wide soon after.
Tadic was soon on the scoresheet himself as he was gifted possession by a poor Mannone clearance and swept the ball in for his first Premier League goal.
Sunderland were in pieces by this stage and Southampton showed no mercy, adding a seventh just seconds later as substitute Wanyama thrashed an effort past the hapless Mannone.
Still it continued and Mane was the next to get in on the act as the Senegal man hit his first Saints goal, with Tadic again supplying the ammunition from the left flank.
There was to be no record-equalling ninth for the hosts but this was a signal of intent from Koeman's side as they look to prove their impressive start is no flash in the pan, with the huge victory taking them third in the table and leaving Sunderland in abject misery.
Ronald Koeman told Southampton to "take a picture" of the Barclays Premier League table after Graziano Pelle volleyed "one of the goals of the season" to see off QPR.
Saints boss Koeman heaped praise on Pelle's scissor-kick winner as Saints edged out Harry Redknapp's side 2-1 at St Mary's, conceding his surprise at his side's impressive start to the campaign.
Southampton held on to second place thanks to strikes from Pelle and loan man Ryan Bertrand that secured their fourth straight win.
Koeman admitted Southampton have exceeded his pre-season expectations, shaking off Mauricio Pochettino's exit and a raft of player departures.
"I'm a little bit (surprised) by our start yes, because always you have to wait after a lot of changes in the team," said Koeman.
"But we had a good pre-season, we had some difficult moments in the club, a lot of people, even the press was a little bit afraid, with questions about relegation.
"But we know what our qualities are, and little by little we have shown them.
"I'm satisfied with how we're playing. Now we can watch the table tonight and take a picture.
"Then we start again on Tuesday."
Koeman will now hand his Southampton players two days' rest ahead of next weekend's league clash with Tottenham.
Southampton's players turned down a day off on Wednesday in a bid to seize on the good feeling fostered by Tuesday's Capital One Cup victory at Arsenal.
Pelle's acrobatic volley separated the teams on Saturday, the Italian pouncing just moments after Charlie Austin had levelled with an impressive finish for QPR.
Koeman believes there will be few more spectacular Premier League strikes this term than the improvised winner.
"It was a great finish - it will be one of the goals of the season," he said.
"And still it's more important because it made it 2-1.
"I'm happy about his performance from the start of the season, because he has showed his quality and personality.
"He will always keep the ball for the team.
"And that's important for the team in how we play.
"And if you can score like this, you can't do it better."
Rangers boss Redknapp shook off taunts from Southampton fans on his south coast return, owing to his defection from Saints to Portsmouth in 2005.
The ex-Tottenham boss was impressed by Austin's second league goal of the campaign, but admitted his side must sharpen up further in their bid for top-flight stability.
Brazil star Sandro returned after knee trouble only to depart in the opening exchanges due to a heavy blow to the head.
Redknapp allayed fears about any lasting damage, admitting the medics had to remove the holding midfielder as a precaution.
"It was a great finish, he's proved again he can score at this level and that's important and encouraging," said Redknapp.
"We didn't play too badly at all to be honest, but we can still keep improving and we've got to make that progress.
"We were sorry to lose Sandro so early in the game, after a matter of minutes.
"We kept going, kept working, lots to work on and we can keep going.
"He got a bang on the head and the doctor was worried about it.
"He didn't look too bad at half-time, but obviously the doctors have got to err on the side of caution.
"There have been plenty of new directives on head injuries and we just couldn't take any risks at all."
On-loan defender Ryan Bertrand opened his Saints account to hand the hosts the lead before Charlie Austin blasted home on the turn.
Italian striker Pelle trumped Austin's smart finish with a true showman's goal to secure Saints' fourth win in six Premier League ties this term.
Former Southampton boss Redknapp received the hate-filled welcome he anticipated, after quitting Saints for bitter rivals Portsmouth in 2005.
The ex-Tottenham boss was subjected to vitriolic chanting from home supporters, but would have chuckled to himself when Austin stole the second half equaliser.
The former bricklayer had a fine chance to double his tally, but headed wide, while Nico Kranjcar also hit the woodwork with a fine free-kick.
The ex-Portsmouth midfielder fired a set-piece goal to steal QPR a point against Stoke last weekend, but was just unable to repeat the feat at St Mary's.
Pelle's stunning volley won the day however, the £8million summer recruit notching his fifth Southampton goal.
Southampton's victory kept them second in the table, after Chelsea eased past Aston Villa at Stamford Bridge, to continue new boss Ronald Koeman's fine Premier League start.
Dusan Tadic spent the first half gamely battling to cajole Southampton's staccato attack into something resembling fluency.
Despite his best efforts however the hosts were unable to break the deadlock before the break, even with QPR remaining largely toothless up front.
Morgan Schneiderlin squandered the chance of the half, screwing his low shot well wide after being sent clean through by Sadio Mane.
Serbia striker Tadic wasted a gilt-edged chance himself, unable to connect cleanly enough in the box to provide the power to beat Rob Green.
The relieved Rangers keeper tapped wide at full stretch when Tadic should have buried his point-blank effort.
None of Saints' big men were able to meet Tadic's early whipped free-kick with any accuracy early on and that missed opportunity set a frustrating tone for the opening exchanges.
Pelle fired wide of Green's left post when he could have aimed across goal too, as Saints continued their wasteful half.
Eduardo Vargas and Austin spent precious little time combining with their midfield to offer any tangible threat for Rangers, but Kranjcar and Leroy Fer had to shoulder their share of blame for not bridging the divide.
Matt Phillips blasted high and wide after a botched clearance from Nathaniel Clyne, before Austin chipped wide in first-half stoppage time.
Redknapp's men were fortunate to turn around on level terms, desperately hoping to grow in stature with every chance Saints fluffed.
Just when the visitors thought they could frustrate Southampton into a costly error though, Koeman's men opened the scoring.
Mane's prescient back heel opened the QPR defence, Bertrand raced through the door and blasted the ball under Green to wrestle control for Saints in the 54th minute.
Austin disabused any Saints notions of coasting to victory with a fine finish 12 minutes later, firing home on the spin after controlling Vargas' cross.
Rangers' return to level terms was meant to stun Saints into a state of shock, but instead the hosts struck straight back.
A peripheral figure for much of the afternoon, Pelle forced the tie to turn on his acrobatic finish.
The Italian striker teed himself up before unleashing an unstoppable scissor-kick blast into the top corner to put Saints 2-1 to the good only two minutes after the visitors had levelled.
Steven Davis rattled the woodwork from 20 yards as Saints pressed again, before Austin headed wide in another fine opportunity for QPR.
Kranjcar hit the angle of post and bar for QPR as Redknapp's men ground on in search of a second equaliser.
Tadic struck a post as the match edged into stoppage time, but Saints eased to victory despite failing to add a third goal.
A disappointing afternoon for Southampton in their Premier League clash with Manchester City.Read the full story ›
West Ham 3 1 Southampton
Only two of the new arrivals, Lewis Holtby and William Kvist, were registered in time to feature against Saints, who spent much of the first half on the backfoot and had goalkeeper Artur Boruc to thank for keeping the score level.
Fulham were made to pay for those missed opportunities in the second period as Southampton ruthlessly exposed their soft underbelly, with Adam Lallana opening the scoring after 64 minutes with a superb strike across the face of goal.
Rickie Lambert netted his 100th league goal for Saints six minutes later, before the visitors' other England international, Jay Rodriguez, curled home exquisitely in front of the watching national team manager Roy Hodgson.
While Bent saw a handball appeal turned down at the other end, it was Southampton in control.
Lambert was left frustrated after he could not make the most of a hashed clearance, only to then turn provider for the opening goal.
Collecting the ball just inside the Fulham half, the England forward played a wonderfully-weighted ball for Lallana to impressively fire low past Stekelenburg.
The 64th minute goal extended Fulham's wait for a clean sheet to a ninth match - the longest run in the top division - and they almost conceded again soon after.
Only a late block saw a Steven Davis strike wide, before Lallana started a great counter-attack and fed the ball to the overlapping Shaw, whose low cross was prodded wide by Rodriguez.
Southampton did not have to wait long for another goal, though.
Nathaniel Clyne, on as a 58th-minute substitute for the injured Chambers, sent in a fine low ball from the right, which, thanks to an intelligent stepover by Rodriguez, fell perfectly for Lambert to slot home.
Rodriguez's selflessness was rewarded in the 75th minute with a goal of his own. Lambert's long ball to the forward was controlled by his fellow England international, who cut inside away from Hangeland and curled home brilliantly into the top right-hand corner.
Substitute Pajtim Kasami curled wide as Fulham looked to reduce the deficit in the closing stages, but they failed to threaten Boruc as Southampton won a league game at Fulham for the first time since October 1947.