Arsenal’s Premier League title challenge suffered a massive blow as the 10-man Gunners were beaten 1-0 at home by lowly West Ham on Saturday.
Jarrod Bowen headed in the only goal just before half-time and an injury-hit Arsenal had no reply after Myles Lewis-Skelly was sent off on 73 minutes.
Defeat leaves second-placed Arsenal still eight points adrift of leaders Liverpool.
The Reds can extend that advantage to 11 when they visit a diminished Manchester City on Sunday.