Arsene Wenger has confirmed Arsenal's Tomas Rosicky has suffered a fresh injury setback in his attempts to reach full fitness.
Rosicky had been playing a key role in The Gunners' pre-season after previously going 18 months without kicking a ball due to a series of injuries.
Wenger has now confirmed that the Czech winger has suffered a hamstring strain in training that could keep him on the sidelines for up to six weeks.
The loss of yet another midfielder is not good news for Wenger, who has already had to digest the news of losing Samir Nasri due to a broken leg.
"He could be," replied Wenger when asked if Rosicky could be out of action for up to six weeks.
"It's worrying because he was so sharp. It's difficult to accept that suddenly he has a muscle injury.
"It's not major problem, but you get these kinds of injuries when you've been out for 18 months."