His hospitalization casts doubt over what part he might be able to play in the monthlong tournament in the United States.

Kylian Mbappé was sidelined from Real Madrid's Club World Cup match due to his hospitalization for acute gastroenteritis, and the superstar's return date uncertain.

Real Madrid star Kylian Mbappé has been hospitalized “to treat an acute case of gastroenteritis,” the club announced Thursday.