Arsene Wenger was delighted to close the gap on Manchester City but admits Arsenal got 'a bit lucky' with the 1-0 win at Burnley.
Wenger accepted he was lucky to celebrate 20 years in charge of Arsenal with a Premier League victory after Laurent Koscielny's controversial stoppage-time winner sank the Clarets at Turf Moor.
Sean Dyche's side had gone closest to breaking the deadlock in the second half when Michael Keane's towering header hit the crossbar, but in the third minute of added time Arsenal skipper Koscielny snatched the winner with what appeared to be his elbow.
Koscielny was lurking at the back post and was hit by Alex Oxlade-Chamberlain's close-range effort after Theo Walcott had headed on Alexis Sanchez's ball in following a short corner.
There was also a hint of offside with both Oxlade-Chamberlain and Koscielny standing close to the goalline.
"It's a big win because City lost and we were five points behind and when you're five points behind a top-quality team, when you have an opportunity to get a bit closer you cannot miss it," Wenger said.
"That would have been the negative aspect of our game today had we not won."
Wenger added: "We got a bit lucky. We were a bit fortunate to win the game, but you can only have a chance to win if you keep going. It was the kind of game you could have won 1-0 and you could have lost 1-0."