Bastian Schweinsteiger will travel to Poland with the Germany squad on Monday after being given the all-clear to resume training.
The Bayern Munich midfielder had become a doubt for Euro 2012 after missing Thursday's final warm-up match against Israel due to a calf injury.
But fears he may not be fit enough for Germany's first game against Portugal on June 9th have been allayed by the national team's doctor Hans-Wilhelm Muller-Wohlfahrt.
"Bastian has absolutely no problems anymore," said Dr Muller-Wohlfahrt on the website of the German Football Association (DFB) on Sunday.
"He has no pain. He will continue to receive treatment, but we expect him to train again with the team tomorrow.
"Of course he is a bit behind the others in terms of training, but I expect him to be fully available for the Portugal game."
With Schweinsteiger back, Germany coach Joachim Low is now looking forward to a successful tournament.
"There is no reason not to look forward to these European Championships," he said.
"We are ready, we have trained well and we are pleased that things are now getting under way.
"We have got to focus a lot over the coming week and we have a lot of work ahead."
After facing Portugal, Germany then clash with neighbours Holland before finishing the group stage against Denmark on June 17th.