Arsenal ended a two-match losing run with a comfortable 3-0 win over Southampton at Emirates Stadium.
Southampton had dominated the early stages but conceded the opening goal when Alexandre Lacazette finished off a sweeping move that started from the back and involved Bukayo Saka.
Martin Odegaard doubled the lead on 27 minutes with a goal in his third successive match as he headed home after good work by Takehiro Tomiyasu and Kieran Tierney.
Gabriel sealed the win 17 minutes into the second half with another header from Gabriel Martinelli's corner that beat Southampton's emergency goalkeeper, 40-year-old Willy Caballero.
Martinelli hit the bar and Saka rattled the post in the closing stages of a dominant Arsenal display.
Arsenal are sixth on 26 points, a point behind West Ham United in fourth. Southampton stay 16th on 16 points.
Arsenal: 15 Dec v West Ham (H)
Southampton: 15 Dec v Crystal Palace (A)
Referee: Jarred Gillett. Assistants: Adam Nunn, Neil Davies. Fourth official: Anthony Taylor. VAR: Michael Oliver. Assistant VAR: Scott Ledger.