A late Santi Cazorla penalty sealed three points for Arsenal on Saturday as they beat Southampton 2-1.
Dusan Tadic gave the visitors a surprise lead when his free-kick smacked the bar and bounced over the line off of Petr Cech's back.
But Arsenal fought back and pulled level later in the half as Laurent Koscielny's overhead kick flew past Fraser Forster.
The game looked set to end in a draw as it entered injury time, only for the referee blew the whistle for a handball in the box, and Cazorla stepped up to wrap up the points.