Arsenal manager Arsene Wenger has revealed that Per Mertesacker will be fit for Wednesday's Champions League trip to Marseille.
The German defender was forced to miss Saturday's 3-1 win at Sunderland in the Premier League.
"There is good news," Wenger told the club's official website. "Mertesacker will be available again after illness."
Meanwhile, striker Olivier Giroud remains a doubt for the Gunners with a knee problem.