Arsenal boss Arsene Wenger described Calum Chambers' red card against Stoke City as a "bad decision" by referee Anthony Taylor.
The 19-year-old was shown a second yellow card in the second half for pulling back Stoke striker Bojan Krkic and will miss the Gunners' next game, against Newcastle United.
"It [Calum Chambers' red card] was a bad decision. If Chambers has to go off today, I can watch with you the game and I'll find you five more players who should go," Wenger said.
"I don't want to comment too much on the referee's decision. Watch the game again and watch what happened on the pitch.
"I don't think that Chambers deserved to be sent off if compared to some other people who put arms and elbows in faces."
The defeat means the Gunners failed to move closer to leaders Chelsea but the Frenchman says his focus in only on his team.
"We have nothing to do with that," Wenger said.
"Chelsea's Chelsea, Arsenal's Arsenal. What we want is to win our games. You don't have to look at what the others do."
Striker Danny Welbeck was a constant nuisance after coming on as a substitute and Wenger says fatigue was the reason why he started on the bench.
"Danny [Welbeck] has played a lot, he had a little groin problem," the Frenchman said.
"He could have played. I rotated a little bit because I wanted to give him a breather. I had to respond at half-time unfortunately and it looked like he was alright.
"We have three or four strikers from game to game and not everybody can play. As Alexis has played every game, he has to dig deep in every game. At some stage you have to rest the players."
Meanwhile, the Frenchman confirmed Alexis Sanchez will not feature in mid-week away at Galatasaray.
