Friday 29 September 2017 08:21, UK
Manchester City have confirmed Benjamin Mendy has ruptured the anterior cruciate ligament in his right knee.
The France international defender sustained the injury during the first half of Saturday's 5-0 Premier League victory at home to Crystal Palace.
After initial tests in Manchester at the start of the week, Mendy travelled to Barcelona to see a specialist doctor, where further examinations of the knee on Thursday confirmed the extent of the injury.
The player will undergo surgery in Barcelona on Friday.
A club statement said: "Everyone at the club wishes him a speedy recovery."
Mendy, 23, joined City from Monaco for a fee of £49.2m in July, and manager Pep Guardiola has admitted he could look for a replacement in January.