Arsenal lost their second London derby in a week as visitors Chelsea won 2-0 at the Emirates.
Two first half goals from Romelu Lukaku and Reece James made it two defeats in a row for the goaless Gunners.
Victory ensured the current Champions League holders made it two wins in a row, as the gap between the two sides was emphasised in north London on Sunday afternoon.
Read on for the Gooner's PLAYER RATINGS:
Cédric Soares: 4
Holding: 5 (Booked)
Marí: 4 (Booked)
Tierney: 5 (Substituted for Tavares 66 - 5)
Sambi Lokonga: 5.5 (Booked)
Smith Rowe: 5
Saka: 6 (Substituted for Aubameyang 61 - 5)
Martinelli: 6 (Substituted for Balogun 79 - 5)