Chelsea defender Wesley Fofana has been forced to undergo surgery on an ACL injury, the club has confirmed.
Fofana, who joined the Blues for £70million last summer, is now expected to spend a lengthy period on the sidelines as he recovers from the operation.
The club's statement continued: 'The 22-year-old did not travel to America for the club's pre-season tour due to specialist medical assessments, which unfortunately confirmed that an operation would be required.
'Wesley will now begin his recovery and work with the club's medical department at Cobham during his rehabilitation phase.