The former Bayern centre back will not be able to face his former team if he fails to recover from the injury picked up against Hoffenheim on the final day of the Bundesliga season.
Dortmund are already battling to get Mario Gotze fit in time for the match next week.
What is your opinion? Feel free to discuss the article under. You have to comment by using your Facebook profile. Be fair and have respect for other people and opinions!
Chelsea have struggled to build momentum in the opening stages of the campaign and are currently looking over their shoulders at the relegation zone.
Who of Europe’s top strikers will move to England this summer?