Chelsea London commented on the details of the injury of the team's newcomer Christopher Nkunku on their official resources.
Christopher Nkunku, Getty Images
The 25-year-old footballer injured his knee in the Blues' last friendly during the pre-season training camp against Borussia Dortmund. The Frenchman underwent surgery due to meniscus problems. Nkunku will need more than four months to recover from the surgery.