Manchester United forward Mason Mount will be out for "several weeks" with a leg injury, says manager Ruben Amorim.
The England international was forced off just 14 minutes into Sunday's Manchester derby win at neighbours City.
Speaking after United's Carabao Cup defeat at Tottenham about Mount's expected absence, Amorim said: "I don't know the exact date but it is going to be long."
Mount was making just his fourth Premier League start of the season. He made only five starts during his first season with United after joining from Chelsea in July 2023.
The 25-year-old missed five months of last season with thigh and calf injuries, and has been out for two months of the current campaign after suffering hamstring and head injuries.