Oliver Kahn fears future manager Jurgen Klinsmann could derail Bayern Munich as they chase the Treble.
Goalkeeper and captain Kahn has hit out at Klinsmann, who he claims diverted attention by watching Bayern in the Uefa Cup on Thursday.
Klinsmann is set to take over at the Allianz-Arena in the summer and he was in the stands to watch Bayern's 1-1 first leg draw with Getafe in the quarter-finals of the Uefa Cup in midweek.
And Kahn believes Klinsmann was wrong to watch his future club and that the former Germany coach could distract Bayern as they chase glory in Europe, the Bundesliga and the German Cup.
"I consider it a lack of style because you just don't do that," Kahn told newspaper Munchner Abendzeitung. "We are on track to win a Treble and this kind of behaviour diverts attention.
"I have never heard of a coach who is coming on board the following season being present at matches in the current season."
Kahn retires at the end of the season and will not be playing under Klinsmann, who overlooked the shot-stopper and fielded Jens Lehmann instead during his time in charge of Germany.