Swansea City all but ended West Ham United's hopes of qualifying for the Champions League with a stunning 4-1 away win at Upton Park on Saturday.

The Welsh club, hit by injuries and with little to play for having long been assured of Premier League survival, were 3-0 up inside 51 minutes courtesy of goals from Wayne Routledge, Andre Ayew and Ki Sung-Yeung.

West Ham, in their penultimate match at Upton Park before moving to the Olympic Stadium next season, pulled a goal back when Diafra Sakho's effort was finally put through his own goal by Swansea's Stephen Kingsley.

Yet far from being the cue for a Hammers revival, it was Swansea who scored again courtesy of substitute Bafetimbi Gomis's stoppage-time effort.

Defeat left sixth-placed West Ham, now just two points in front of Southampton, with a pair of tricky season-ending matches against Manchester United and Stoke City in their quest to assure themselves of at least a place in next term's Europa League.

Hammers playmaker Dimitri Payet was narrowly off target with two free-kicks and it was Swansea who opened the scoring in the 25th minute.

Ki collected the ball on the left and passed to Kyle Naughton on the right and, with the Hammers defence out of position, his cross was turned in by the unmarked Routledge.

West Ham should have equalised when Lukasz Fabianski flapped at a Payet corner but Angelo Ogbonna shot over the top from in front of an open goal.

Worse followed for the home side when Swansea, six minutes after going 1-0 up, scored a second goal that was similar in its creation to their opener.

This time Kingsley raced past Victor Moses and his cross gave Ayew a tap-in.

Six minutes after half-time Swansea made it 3-0, Modou Barrow cutting the ball back for South Korea's Ki to slot home.

West Ham eventually had a goal in the 69th minute when Sakho, via a deflection off Kingsley, stabbed in the rebound at the second attempt after Fabianski had saved Michail Antonio's header.

But the Hammers conceded another goal late on when Gomis, after good work by Ayew, beat Darren Randolph.