John Stones is considered a major doubt for England’s first Euro 2024 match against Serbia.
The Manchester City defender has been confined to his bedroom to avoid spreading an illness with which he has been suffering.
Stones missed England training on Wednesday.
England face a crisis at centre-back, where Harry Maguire was forced to miss the tournament with a calf injury.
Brighton’s Lewis Dunk is on standby to start alongside Marc Guehi.
