The Gunners missed the chance to move four points clear at the top of the Premier League table following their 2-2 draw at Southampton.
They were forced to recover from the shock of conceding Jose Fonte's first-half goal as Olivier Giroud and Santi Cazorla put Arsenal 2-1 ahead at St Mary's but Adam Lallana equalised to deny the north Londoners a vital three points.
Mathieu Flamini was dismissed for an 80th minute challenge on Morgan Schneiderlin and will be suspended for three matches, while Santi Cazorla was forced off with an injury.
Abou Diaby and Theo Walcott are long term absentees and Wenger admitted that Aaron Ramsey suffered a setback during training and may be out for longer than expected.
"I have nothing to tell you tonight, maybe I hope we have something to tell you because we lost a few players now," Wenger told Sky Sports.
"We have lost Flamini for three games and Ramsey, but overall I think Jack Wilshere will be back soon, so I think we'll be OK."
When asked about Welshman Ramsey's injury, Wenger said: "Yes, he has had a set-back in training yesterday (Monday) but we hope it's not for too long.
"He will certainly not be available for Sunday's game (at home to Crystal Palace). I have to (think about ins and outs)."
Regarding the game, Wenger revealed he was happy to settle for a point, adding: "We have shown again great character.
"It's not enough but at least considering the situation it's not too bad the way we responded."