The Gunners, who had earlier hit the woodwork twice and had a goal disallowed, went ahead when mercurial winger Nicolas Pepe curled a brilliant finish past Rui Patricio after a couple of nutmegs, on Nelson Samedo and then Ruben Neves. It's hard enough to win games in this league and those big decisions are like that'.
Things went from bad to worse for the visitors when goalkeeper Bernd Leno inexplicably handled the ball outside of his penalty area after racing out to challenge Adama Traore.
Mikel Arteta is expected to make no changes to his backline with Cedric continuing to start at left-back in the absence of Tierney.
In a rare Wolves attack, Daniel Podence slipped a well-timed pass to Jose, making his home debut, and he looked poised to score before Brazilian Luiz, trailing behind him, accidentally clipped his heel, sending the striker tumbling to the deck.
'It was a big decision. "If they got it right and can justify that they got it right I hold my hand up and apologise", Arteta told reporters of Luiz's red card.
"If you want to talk about the decision, I have just seen the replay 10 times, in five different angles, and I am sitting here with you guys and I can't see any contact", Arteta said in his post-match press conference.
"I would like to see if VAR has different angles".
Arsenal need to put in a call to referees chief Mike Riley and get him to sit down with David Luiz and explain the laws of the game.
Similarly the midfield should remain unchanged from the Manchester United game with Partey and Xhaka starting in a double pivot. "You play for 45 minutes in the Premier League without your central defender, against this opposition, of course it changes the game".