Chelsea a mistake for Ballack, says Bayern boss
Ballack left Bayern in the summer, joining Chelsea on a free transfer and signing a deal which is thought to make him the highest paid footballer in the world with wages of £130,000 a week.
But Ballack has failed to shine in a Chelsea shirt this season, and along with Andriy Shevchenko has been blamed for unbalancing the team as they have hit problems in recent weeks.




