Ten-man Arsenal earned a point against Southampton to bring their three-match losing streak in the Premier League to an end.
Theo Walcott had opened the scoring on his return to his former club with a delightful dink over onrushing goalkeeper Bernd Leno.
Pierre-Emerick Aubameyang finished smartly after the break to level as Arsenal ended a run of 797 minutes in the Premier League without a goal from open play.
But the Gunners' ill-discipline cost them once again as Gabriel was sent off after being booked twice in four minutes.
Substitute Nathan Redmond struck the crossbar soon after as Southampton pressed for a winner that would have moved them briefly top of the league.