However, the ex-Borussia Dortmund man has made just 44 league appearances for Arsene Wenger's side since arriving in 2006.
The 28-year-old last played for Arsenal in January 2008 and missed the whole of last season due to injury.
“I think I will be back in the autumn," he told Czech newspaper Sport.
"According to my fitness coach I could have been playing at the end of the season as he thought my fitness was okay.
"I think it was obvious from the training that I was ready to play, if not for the 90 minutes.
“But the club decided not to play me. They saw that I was okay, but maybe they did not want to take the gamble.
"Until I play in a league match I will not be able to tell what my chances are, but when it comes to fitness alone I am in better shape than when I came to Arsenal.”
“I am missing the competition. Playing alongside Cesc Fabregas and Theo Walcott makes you feel comfortable and I think that I have been out for a while," he said.
"Now that I have recovered, I am a new option for the manager. We have a strong team capable of moving mountains in all competitions.”
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