Hector Bellerin's 92nd-minute equaliser rescued a point for Arsenal in a thrilling 2-2 draw with Chelsea at the Emirates.
Marcos Alonso's 84th-minute strike looked to have secured a vital three points for the champions, but Bellerin struck deep into stoppage-time as the points were shared.
Jack Wilshere's first Premier League goal since May 2015 had fired the Gunners into a deserved 63rd-minute lead, but Eden Hazard hauled Chelsea level from the penalty spot four minutes later.
The draw leaves Chelsea on 3rd position with Arsenal sitting 6th on the English Premier League table.