"I think it was the quarter-finals of the Champions League. I’d been in and out of the team at the time."
Ballack also responds to claims of similarities between himself and Havertz.
Kai Havertz has been in brilliant form again this season with the likes of Liverpool and Man Utd linked with him.
Mourinho signed Ballack from Bayern Munich in 2006.
"This Bayern Munich team seems to be really, really well prepared but you have to cause them problems."
Ballack played for both Chelsea and Bayern Munich.
Arjen Robben's reign as the winningest Premier League player ever has finally come to an end. Just about.
Michael Ballack questions the decision to hand Joachim Low a new deal just before the World Cup...
"He's maybe got more strings to his bow than even Ballack had." Roy should know...
Some inspiration for Alexis Sanchez, in case he wants to run down his contract
Wishing someone a happy retirement is too mainstream anyway.
"But if he wants to win a major title, he has a bigger chance to achieve that at Bayern." Well, that's true...
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