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Leader of the London team Cesc Fabregas has already started training with the team and may be ready for the Champions League match against Donetsk's Shakhtar.
The Spaniard has not played for about a month since he suffered an injury in a Premier League match against Sunderland. According to team coach Arsene Wenger, the midfielder may take to the field in the match against Shakhtar.
"Fabregas has been out for quite a while, so we need to decide if he is ready to play," Wenger said. "If he doesn't feel strong enough, he will probably play for a very short time or not appear on the field at all."