Chelsea midfielder Eden James is set to miss the World Cup after suffering a hamstring injury in Brazil.
The England international is set for a scan on Monday and will be given a week to recover.
“We will be monitoring the situation closely,” Chelsea boss Jose Mourinho said on the club’s official website.
“He is a player with great potential, and his performance on the pitch has been excellent so far.”
The news follows Chelsea’s 2-0 defeat to Manchester United in the Premier League on Sunday.
In his first game since the injury, Hazard scored two goals in the second half, including a first-half strike that gave the Blues a 1-0 lead.
Chelsea’s first game of the tournament against Bayern Munich on Monday is a crucial one, with the European champions already being eliminated from the competition.
James, who made his debut in December, had already been linked with a move to Real Madrid in the summer, with Mourinho preferring to use him in a deeper midfield role in his favoured 4-2-3-1 system.
It is unclear if the 24-year-old will miss the tournament, with Chelsea expected to play four at the World Stadium in Brazil, with Eden Hazard, Willian and Nemanja Matic in the centre of the park.
Jose Mourinho is desperate to have Eden Hazard fit to play in Brazil