Cardiff City remain at the foot of the Premier League table after losing 2-0 at Old Trafford.
Juan Mata enjoyed a winning start to life at Manchester United as Robin van Persie and Ashley Young scored the goals that defeated Cardiff 2-0.
Mata completed 83 minutes of his debut following his club-record £37.1million move from Chelsea.
The midfielder made an immediate impact, sparking the move that led to Van Persie's sixth-minute opener.
By then, Young had belted in an excellent second to ensure the highpoint of Ole Gunnar Solskjaer's Old Trafford return was the reception he received from the home fans as his side remained at the foot of the Barclays Premier League.
Craig Bellamy was booked for kicking the ball away at a disputed free-kick and Solskjaer sat slumped in his seat, growing weary, no doubt, of responding to repeated songs of affection from the home support.
Craig Noone ended a forceful run in disappointing fashion when he belted his shot over.
Mark Hudson forced a decent save out of David de Gea, who also got himself in a tangle with Evans that was fortunate to end with nothing worse than the concession of a corner.
Young provided a second goal for the hosts later in the game, cutting in from the left wing before firing into the bottom corner.
Despite their side's woes the home fans had not lost their sense of humour as a chant of "we are staying up" proved, as United secured the victory.
It's half-time at Old Trafford and Cardiff City are trailing by a goal.
United fans welcomed back Cardiff manager Ole Gunnar Solskjaer on his return to his old club.
Robin Van Persie's header into the top left corner gave the hosts an early lead in the 6th minute.
Swansea have been beaten by Tottenham Hotspur at the Liberty Stadium.
Spurs' Emmanuel Adebayor put them ahead with a header in the first-half.
Swansea's Chico Flores scored an own goal in the opening 10 minutes of the second half.
Adebayor then made it 3-0 with his second goal of the match in the 71st minute.
Wilfried Bony, who hit the bar, pulled a goal back with 12 minutes to go but Swansea could not get any closer as Spurs remained unbeaten in the Premier League under Tim Sherwood since he took over from Andre Villas-Boas.
The side who now fall to 15th place in the Premier League table.
Cardiff City Manager, Ole Gunnar Solskjaer, says Craig Bellamy will be key in his side's fight to get themselves out of the Premier League relegation zone. Read more from ITV Sport, here.
A Cardiff City fan from Llanrumney is being honoured by the club after he pulled a toddler from beneath a train on New Year's Day. Bus driver John Noctor was a guest of honour at this afternoon's match for his heroics while in London to see his side play.
Visitors Southampton secured a convincing win against the Bluebirds at the Cardiff City Stadium this afternoon.
The passion shown by the fans as they protested against the club's owner outside the stadium ahead of the clash wasn't matched by the players inside as Southampton totted up three goals in the first half.
Cardiff now move to 16th in the Barclays Premier League table.
Swansea City have lost their Boxing Day match against a dominant Chelsea at Stamford Bridge.
Swans goalkeeper Gerhard Tremmel helped keep the scores low after Eden Hazard scored the game's only goal in the first-half.
Swansea now sit 11th in the Premier League table as Chelsea move to second.
Swansea are down by a goal at Stamford Bridge after Chelsea's Eden Hazard scored in the 29th minute.
Cardiff trail behind 3 goals to nil at the Cardiff City Stadium this afternoon.
Southampton's Jay Rodriguez scored first for the visitors followed by two goals by Rickie Lambert.
Swansea City manager Michael Laudrup says he fears the worst after Nathan Dyer was stretchered off with a suspected broken ankle during his side's 1-1 draw with Norwich this afternoon. Dyer opened the scoring but was then rushed to hospital after a clash with Norwich defender Sebatien Bassong.
"Things like this are part of football, even though we don't know how bad it is yet, but everybody could see it was not good when you get carried out like that" Laudrup said.
"We will wait to see the X-ray and then in a couple of days have an MRI scan to know if it is bad or really bad. Let's wait and see, hoping that if it is bad, it is not too bad."