Laurent Koscielny scored with virtually the last kick of the match as Arsenal edged to a 1-0 victory against stubborn Burnley.
It was exceptionally unfortunate for the Clarets who defended superbly throughout the 90 minutes particularly as the ball appeared to go over the line off the arm of Koscielny, who was already in an offside position from a late corner following Alex Oxlade-Chamberlain’s previous touch.
In a tight first half, Alexis Sanchez’s drive deflected wide of Tom Heaton’s goal before George Boyd fired a 15th-minute effort high and wide after good play by Jeff Hendrick.
The in-form Theo Walcott then clipped an effort five yards wide before Hendrick had an effort blocked for Sean Dyche’s side.
Ben Mee had to be alert to deny Alex Iwobi while Sam Vokes contrived to head Matthew Lowton’s pinpoint cross wide when the Wales international was unmarked just six yards out.
That was the closest either side came to breaking the deadlock before the interval but the Gunners almost took the lead at the start of the second period when a fine move by Arsene Wenger’s side ended with Heaton getting down well to keep Sanchez’s effort out.
Arsenal were now moving through the gears as they began to take control of midfield but the Clarets continued to defend in numbers as they restricted Wenger’s team to hopeful long-range efforts.
In a rare Burnley attack just past the hour mark Petr Cech clawed Johann Berg Gudmundsson’s header away for a corner before Chile international Sanchez slammed a volley on to the outside of a post for Arsenal.
When play swung to the other end Michael Keane’s header rattled the bar and, as both teams pushed for a late winner, Walcott curled an 85th-minute effort inches wide before Arsenal made it five Premier League victories in a row thanks to Koscielny’s last-gasp winner.