Danny Welbeck, making his first appearance of the season as a late substitute, headed a stoppage-time winner as Arsenal boosted their hopes of winning the Premier League title with a 2-1 home win over league leaders Leicester City.
Welbeck, who had not played since last April after a series of injuries, came on after 83 minutes and scored in the fifth minute of stoppage time when he glanced home a Mesut Ozil free kick to secure the victory.
The win lifted Arsenal to 51 points, two behind Leicester, who played most of the second half with 10 men after defender Danny Simpson was sent off in the 54th minute.
Tottenham Hotspur who started the day in second place and Manchester City in fourth meet later on Sunday.
“It was a pivotal moment today because the mathematics meant it could be eight points or it could be two points. That is a great change,” Arsenal manager Arsene Wenger told Sky Sports.
“There’s a long way to go, we play a lot of big teams. But we had a bad spell where we couldn’t win for four games and have now won two on the bounce. We have come out of that bad spell and still have a good chance.”