Southampton ended Arsenal’s 22-match unbeaten run, with a 3-2 win at St Marys on Sunday.
Danny Ings handed the Saints the lead twice, but Henrikh Mkhitaryan also scored twice, to bring the Gunners level.
In the last few minutes when it could have gone either way, Charlie Austin came off the bench to net the winner.
It’s a first home league win for Southampton this season and they are now out of relegation places, following Burnley’s 2-1 loss to Chelsea in the other game.
Pedro Rodriguez and Eden Hazard scored for the Blues, before Solly March pulled one back for the hosts.