William Gallas, who picked up a hamstring problem during his side's clash with Plymouth in the third round of the FA Cup last weekend, is likely to be out for three weeks. "Kolo and Denilson will be back available," Wenger confirmed on the club's official website.
"However unfortunately we have lost William Gallas with a hamstring problem."
He continued: "We lost Silvestre too with a thigh problem last week as well. So we have lost two players from the game on Saturday but we have gained two back.
"I think Gallas and Silvestre will be out for three weeks."