Sanchez scored from a spot kick in the injury time to give Arsenal the right to return to North London as winners.
Burnley pressed the Gunners to the wall in the first 45 minutes as the second half was dominated by the visitors given the defensive mind employed by Sean Dyche.
Nevertheless, both sides were headed to sharing of points if not for the referee’s decision to point at the 12 yards’ after Burnley defender in center referee’s eyes pushed Aaron Ramsey.
Sanchez stepped in confidently and shot to the right end of the post into the net as goal keeper Pope’s follow up was not accurate enough.
In a couple of occasion besides the possession enjoyed by the hosts in the first half, they made attempts on goal which were divinely saved by the precious hands of Pete Cech.
The Gunners have won their last 3 encounters against Burnley in a similar manner in which goals are scored in the injury time.
In January this year, after Andre Gray nullified Arsenal’s one nil lead at the 93rd minutes, Sanchez scored a penalty at the 98th minutes to restore the lead.
Nine months later, at the Turf Moor, Laurent Koscielny scored to give Arsenal the lead three minutes into added time.
Whereas Alexis Sanchez has appeared on the score sheet four times in their last five meetings with Burnley.
Although Tarkowski caused the penalty, his performance was so outstanding that it can go without notice. Eight clearances, five interceptions and three tackles.
Both Arsenal and Burnley coaches have conflicting views about the awarded penalty. As Sean Dyche believes big teams are being favored, Arsene Wenger thinks it was a genuine penalty.
The victory elevates Arsenal to the 4th position ahead of their North London rivals Tottenham Hotspurs by a point clear.
Whereas Burnley who initially shared points with Sanchez side are now left with stagnant points of 22 and in the 7th position.
As Sanchez will lead the attack on Huddersfield again for the Gunners in their next fixture at the Emirates Stadium, Burnley will be travelling to Bournemouth for their premier league fixture in Wednesday night.