The Saints were level in the second half thanks to super sub Charlie Austin, but Welbeck headed in the victor for the hosts. Supporters who did attend witnessed five goals, two red cards and a host of chances at both ends. In many ways, Arsenal were playing...
Yet the speed with which it was replaced by despair encapsulates why their hold on their Premier League status remains so uncertain.
And this 150th win at their home ground since they left Highbury in 2006, adds more weight to Wenger's claim that their relative woes this term maybe require a little perspective.
"He proved himself at Dortmund, he proved himself in the Champions League. I know when I get the opportunities in front of goal I will put them away - apart from the one I put over", said Welbeck.
Welbeck put Arsenal ahead seven minutes before the break when he accepted a pass from Alex Iwobi on the left and shrugged off challengers before unleashing a shot that was helped past McCarthy by a deflection off Maya Yoshida.
"My mind is set on the next game, doing well in those games".
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Arsenal have won six matches in a row in all competitions for the first time since May 2017.
Danny Welbeck netted a brace in a game which saw both sides end with only 10 men.
Another England World Cup hopeful was heavily involved as the injury-ravaged Welbeck netted his first league goals since September.
Wenger also praised his team's spirit in fighting back from two setbacks in the game, which again was played in front of thousands of empty seats at the Emirates.
At that point Wenger abandoned all pretence of tactical shape and defensive nous by simply ordering his side to attack to win the game.
"People were questioning, will he come back or not?" Now we hope to keep this going.
"If they can show the kind of belief, and fight, in their remaining fixtures I think they might get out of trouble".