Arsenal had centre back Gabriel sent off in a 1-1 home draw with Southampton in the Premier League on Wednesday, stretching their winless run to six games and piling more pressure on their manager Mikel Arteta.
Although defender Rob Holding nearly snatched a stoppage-time winner for Arsenal when he headed against the crossbar, it was another poor performance by the Gunners who were on the back foot throughout.
The result left Arsenal, who had lost their previous four home games, in 15th place while Southampton moved up one place to third on 24 points.
He was powerless three minutes later, however, as Theo Walcott scored against his former club to put Southampton ahead with a dinked finish after Che Adams released him through the middle with a defence-splitting pass.
Nicolas Pepe and Bukayo Saka went close for Arsenal before Pierre-Emerick Aubameyang levelled in the 52nd minute with a clinical finish into the bottom left corner after good work by Saka and Eddie Nketiah.
It seemed Arsenal had gained some momentum but they were pegged back again after Gabriel was sent off for a second bookable foul when he hauled down Walcott in the 62nd minute.
Substitute Nathan Redmond hit the woodwork from close range for Southampton and Arsenal were forced to defend desperately in the closing stages as the visitors pressed forward.
Holding then nearly stunned the Saints as he met an inviting cross from the left with a header that left keeper Alex McCarthy rooted to the line as it rattled the crossbar.
Arteta expressed his frustration at the sending off postmatch: "Very disappointed because in that moment I was thinking to change the centre back straight away -- we didn't even have time to do that.
"In the end we got a point that considering the circumstances we have to accept.
"The boys came out like we did three days ago, we scored a really good goal, on top in the game, and again we shoot ourselves in the foot."