ARSENE WENGER admits Marouane Chamakh's form has suffered due to exhaustion.
Chamakh made a strong start to his debut season in England but his influence has waned recently.The 27-year-old free transfer from Bordeaux has failed to hit the target for Arsenal in his last three matches.
Now boss Wenger must decide whether to rest him against Chelsea tonight - with Robin van Persie and Nicklas Bendtner both available.
Wenger said: "Marouane has given a lot. He has played a lot on his own up front. He is a bit tired and is used to having a winter break in France at this stage of the season. He has played nearly every game this season.
"He feels that he had a little dip physically but he's working very hard in training to come back."
Arsenal have lost their last five matches against Chelsea - but Wenger said: "We have the quality."
