Leicester's Daniel Amartey had to be taken off on a stretcher in the closing stages of his side's game at home to West Ham.
Amartey, who was deployed at right-back, left the field with his leg in a brace having suffered a serious-looking ankle injury following a clash with West Ham's Michail Antonio.
The Leicester player appeared to catch his studs in the turf and twisted his leg.
Amartey received oxygen on the pitch before being taken off to applause from supporters.