Arsenal moved back into the top four with victory over Southampton thanks to first-half goals from Alexandre Lacazette and Henrikh Mkhitaryan.
The hosts scored through Lacazette after just six minutes and remianed in full control of the game throughout.
A much-improved Saints did threaten after the break, but remain in the relegation zone after a first defeat in five games.
Frenchamn Alexandre Lacazette races away in delight after putting Arsenal ahead after just six minutes against Southampton
Henrikh Mkhitaryan struck Arsenal's second after quarter of an hour to confirm the victory early on
Unai Emery cut an animated figure on the touchline as his side registered a comfortable win at the Emirates Stadium
MATCH FACTS, PLAYER RATINGS AND LEAGUE TABLE
ARSENAL: Leno, Lichtsteiner (Koscielny 56), Mustafi, Papastathopoulos, Kolasinac, Torreira, Xhaka, Iwobi (Aubameyang 75), Ramsey (Ozil 63), Mkhitaryan, Lacazette.