Lukasz Fabianski came back to haunt Arsenal as Bafetimbi Gomis returned from injury to grab a dramatic late winner for Swansea City in Monday's 1-0 victory at the Emirates Stadium.
After a forgettable first half, Arsenal pummelled the Swansea goal after the break, but Polish goalkeeper Fabianski - who joined Swansea in the close-season after a seven-year spell in north London - made a string of superb stops to deny the likes of Alexis Sanchez, Nacho Monreal and Theo Walcott.
And Fabianski's contribution proved priceless as Gomis, who came on as a second-half substitute following a month-long lay-off with an ankle injury, headed home an 85th-minute winner, with goalline technology showing the ball clearly went in despite David Ospina's best efforts.
It was the second time Gomis has scored against Arsenal this term after he bagged in Swansea's 2-1 home win in November, and Garry Monk's side maintained their challenge for a sixth-placed finish that will offer Europa League football should Arsene Wenger's team beat Aston Villa in the FA Cup final.
Arsenal, meanwhile, have surrendered the advantage in the race for second to Manchester City with just two games remaining.
