Arsenal fear striker Olivier Giroud could be missing for months with an ankle injury, a situation Arsene Wenger said is "sad for us".
The France international hurt his ankle during the 2-2 draw with Everton at the weekend in which he scored the equaliser late in the game.
The full extent of the injury is not yet known with Giroud set to see a specialist today or tomorrow. He is certain to miss the crucial Champions League play-off against Besiktas on Wednesday night and there are fears he may have fractured a bone, meaning a three-month lay-off.
"Olivier will not play against Besiktas and will see a specialist, then we'll make an announcement of how long he'll be out," Arsenal manager Arsene Wenger said today.
"It can be (a long term injury). We'll see tomorrow. I don't know (if it's broken). It's sad for us," Wenger added.
The news has led to speculation Arsenal will make a mad scramble for a new centre-forward before the transfer window closes on Monday.
Loic Remy, Edinson Cavani and Danny Welbeck have all been linked with a move to the Emirates.
In the meantime, Alexis Sanchez is likely to operate as the loan striker against Besiktas, although there are doubts about his ability to perform the role after he was taken off at half-time for Giroud against Everton.
Yaya Sanogo, Lukas Podolski and Joel Campbell are other options for Wenger.
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