Manchester City defender Aymeric Laporte has undergone knee surgery.
The 25-year-old centre-back sustained the injury during Saturday's 4-0 win over Brighton at the Etihad Stadium.
A statement by the Premier League champions on Wednesday said they are still to learn exactly how long he will be out for.
"Aymeric Laporte has undergone surgery on his knee after damaging his cartilage and lateral meniscus during Saturday's win over Brighton," said the statement.
"The surgery, carried out by Dr Ramon Cugat in Barcelona , was successful and a more detailed prognosis will be provided in due course.
"Everyone at City wishes Aymeric a full and speedy recovery."
