First-half goals from Jakub Kiwior and Leandro Trossard were not enough to beat Crystal Palace, as the visitors twice came from behind to claim a point at Emirates Stadium.
Kiwior put us ahead within the opening three minutes with an excellent header, only for Palace to level through an Eberechi Eze volley from a corner.
Leandro Trossard kept his composure inside the area to restore our lead before half-time, but Jean-Philippe Mateta capitalised on a stray pass at the back to equalise late on.
The result extended our unbeaten run in the league to eight matches, but five of those have been costly draws.