Germany head coach Joachim Low claims defender Jerome Boateng 'owes' the team following his late night antics in Berlin.
The Bayern Munich star hit the headlines at the start of the week after he was photographed on a night out shortly before the German team met to fly to Poland on Monday.
Germany face Portugal in Lviv, Ukraine on Saturday night and Boateng is vying with Bayer Leverkusen's Lars Bender for the right-back berth.
Reports suggest the 23-year-old must prove himself as he battles to make the starting line-up and having left Low fuming.
"Jerome Boateng is fully focused because after causing these headlines he is a little bit in my debt to me, because frankly I didn't like what I read," said Low.
"I spoke to him about this and while he was doing all this during his time off, I didn't like what he did.
"He is ready to give 100 per cent to prove his critics wrong and he has to prove himself over the next few weeks.
"On the right, the first option would be Jerome Boateng, but I have seen in training that Lars Bender could do well in that position and I'll wait until tomorrow (Friday) to make a decision."
Germany are bidding to win a fourth European title and Low has brought in some rules for his players during the tournament which culminates in the final in Kiev on 1st July.
They have been told they may not post on Twitter or Facebook anything regarding tactics, team line-ups or anything from within the squad, while they will be allowed visits from wives and families only after the games.
Alcohol is not banned, but any drinking must be in moderation.