David Moyes' Premier League tenure at Manchester United got off a positive start with a comfortable win at Swansea.
Robin van Persie struck twice, as did England striker Danny Welbeck who now has more goals to his name than he scored in the whole of last season.
United were generally in control, but Swansea new boy Wilfried Bony did manage to reduce the deficit late on in what was his first appearance in British football.
Manchester United struggled to get into the game early on, as Swansea looked the better side in the wet conditions, without creating any meaningful chances.
It took until the 15th minute for the visitors to threaten, but first Van Persie headed straight at the keeper when unmarked in the box, and Ryan Giggs' advancing years caught up with him after being sent through on goal, and he slopping gave the ball away when he couldn't get away from the defence.
The ageing winger had an opportunity to redeem himself three minutes later, but his strike flew wide after Welbeck's shot from inside the area was parried away by Michel Vorm.
Swansea went straight up the other end, as Michu put the ball in the back of the net, but Nathan Dyer was adjudged offside following a strike from Wayne Routledge, which David De Gea could only push back out into the danger area for the No.9 to finish.
The Spanish forward again took aim at his fellow countryman in the 23rd minute, but De Gea repelled the ball wide for a corner, which Michu went on to head wide.
Despite Swansea's strong start, things were rapidly taken away from them just after the half hour mark, as Van Persie superbly controlled a Giggs pass and volleyed home to give United the lead.
Only a minute later United were two goals to the good, as Welbeck was the first to react after a Antonio Valencia's pull back went across the six-yard box, allowing an easy tap in.
Swansea reacted at half-time by bringing on record signing Wilfried Bony, who started on the bench following international duty, and Pablo Hernandez.
The substitutions had little effect on the match, and Van Persie almost got his second of the game just before the hour, but his volley from the right-hand side of the area swerved away from goal.
Wayne Rooney eventually came on with half an hour to go, with the United fans singing the wantway striker's name from the away end.
Despite having a lot of the possession, Swansea struggled to create many clearcut chances, with Angel Rangel coming close in the 70th minute, but his rifling shot went a yard or two wide.
Van Persie was at it again soon after, as his solo run from close to the halfway line resulted in his second of the game. The Dutchman slammed home a shot from 20 yards after finding himself in space.
Bony nearly pulled one back with ten minutes to go, but he seemed surprised when Jonjo Shelvey's cross found him free on the edge of the six-yard box, and the Ivorian glanced a header wide.
The striker made amends a minute late by slotting home from 15 yards to give Swansea some hope going into the final stages.
Welbeck finished off the scoring late on, as his exquisite chip found its way over Vorm, and into the bottom corner of the net.