Kahn turned down chance to join Manchester United
Oliver Kahn claims Sir Alex Ferguson is still mad with him for not joining Manchester United towards the end of his glittering career.
United were struggling to replace Peter Schmeichel and Ferguson made an approach for the Bayern Munich goalkeeper in 2003.
Kahn, who was Germany's captain for their 2002 World Cup final defeat to Brazil, admits he regrets not giving the Premier League a go before he retired in 2008.
"Sir Alex Ferguson is still mad at me today," Kahn told German newspaper Bild.
"He thought that I would move to Manchester United in 2003 or 2004, but I was more interested in trying to define an era at Bayern.
"Looking back, I should have done it then. It would have been a nice challenge for me."
Kahn was in goal for Bayern when Ferguson's United scored twice in injury time to cap a miraculous comeback to win the 1999 Champions League final 2-1 at Barcelona's Nou Camp. That win completed a treble for United that season of Premier League, FA Cup and Champions League titles.