Chelsea winger Callum Hudson-Odoi could be out for a few more weeks.
The English youngster was set to recover from a hamstring problem, but he appears to have made it worse.
The 19-year-old suffered the problem while he was training on Thursday, per The Athletic.
It is a big blow for the winger, who was hoping to get a run of first team games during the rest of the season.
Hudson-Odoi has only managed seven Premier League starts and 10 sub appearances this season.
He has netted a goal and provided four assists in those games.
More news about his injury is expected in the coming days.