The Engelish champion Manchester United will have to pay 4.38 million euro for Kompany.
Manchester are looking for a replacement for Rio Ferdinand, who might be suspended for a while. He missed a drug test after a game.
Alex Ferguson, the manager of United, will come to scout Kompany during Celtic Glasgow - Anderlecht.
The English media compares the young defender to Franz Beckenbauer. But Anderlecht says that the defender will not leave during the winter break. He might even stay for a few more years.