Segun Akanni, Toronto, Canada Arsenal kept up their top-four chase as a late Robert Huth own-goal gave them a lone goal victory over defending champions, Leicester City.
The home supporters at Emirates Stadium seemed set for a deflating evening before Nacho Monreal’s shot found the bottom corner via the German defender’s chest four minutes from time.
Alexis Sanchez had rattled the bar and been denied by Huth’s last-ditch challenge in the Gunners’ best chances before the goal.
But, Leicester also threatened, with Riyad Mahrez bringing a superb save out of Petr Cech in the first half, and then had penalty appeals turned down.
Arsenal are now three points behind Manchester United and four behind fourth-placed Manchester City, having played the same number of games – at least one of the Manchester pair will drop points when both meet on Thursday.
Liverpool, in third, are six points ahead of the Londoners having played two more games.
Meanwhile, Tottenham kept up the pressure on the League leaders, Chelsea, as Christian Eriksen’s superb long-range strike secured a hard-fought victory at Crystal Palace on Wednesday.
Spurs had struggled to break down a disciplined Palace side for much of the game and it looked like they would have to settle for a point.
But Eriksen fired into the bottom corner from 30 yards late on to keep Spurs within four points of Chelsea with five games remaining.
Also, Sunderland were left on the brink of relegation after losing to fellow strugglers, Middlesbrough, in the Tees-Wear derby. The match was Middlesbrough first victory of 2017.
