Wolfsburg sporting director Klaus Allofs believes Kevin de Bruyne's head has been turned by talk of a big-money move to Manchester City.
The Citizens are said to have offered £31 million for the Belgian midfielder and are reportedly confident of completing a move this week.
Having been courted by the Premier League giants throughout the off-season, Allofs says De Bruyne has been distracted by all the speculation.
"I think that interested clubs have turned Kevin's head a bit. We are talking about incredible sums here," he told German publication Kicker.
"I understand that all this is on Kevin's mind. He will have to listen to offers. We cannot expect him to just ignore those offers.
"The transfer window remains open for three more weeks. Any interested clubs that still feel they have a chance of signing him will get involved."