LIVERPOOL -- Olivier Giroud is a doubt for Arsenal's Champions League qualifier against Besiktas after injuring his ankle in the 2-2 draw against Everton.

The Frenchman came off the bench to complete his side's comeback from 2-0 down at Goodison Park but limped off after levelling.

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And manager Arsene Wenger said he is worried that the striker could miss the tie, which is level at 0-0 after the first leg, against the Turkish team at the Emirates Stadium on Wednesday.

"It is a big game and I hope we have not lost Giroud in the last minute of the game," he told Sky Sports. "It doesn't look too good. In the final minute, he stretched his ankle."

Wenger praised the target man for his contribution and said that Alexis Sanchez, who started as his main striker, both yet to reach full fitness and short of confidence at the moment.

Olivier Giroud suffered an injury to his ankle in the final minute of Saturday's match, Arsene Wenger said. Stuart MacFarlane/Arsenal FC via Getty Images

The Chilean, who cost 35 million pounds from Barcelona, is yet to score in four appearances for Arsenal and was replaced by Giroud at halftime.

Wenger added in his news conference: "At the moment he is not completely ready physically. He knows he is not at his best physically but when he is, his confidence will come back."

He explained Giroud's original omission by saying: "I have more strikers than before so sometimes I can give them a little rest. Giroud has just played one game since the World Cup."