Arsenal have dropped points after leading 2-0 for the second straight match, drawing 2-2 with West Ham United at the London Stadium.
Mikel Arteta's side increase their lead at the top of the Premier League to four points but have played one more game than Manchester City.
It all started so well for the visitors, who scored twice in the opening 10 minutes through Gabriel Jesus and Martin Odegaard.
But West Ham grew into the match, halving the deficit before half-time as Said Benrahma scored from the spot after Gabriel Magalhaes brought down Lucas Paqueta in the box.
The game was flipped on its head in a two-minute period early in the second half, as Bukayo Saka missed a penalty before Jarrod Bowen struck the equalising goal moments later.
The draw moves West Ham four points clear of the relegation zone.
