Chelsea attacking midfielder Kasey Palmer, on loan at Premier League side Huddersfield Town, has been ruled out for two months with hamstring injury.
Huddersfield manager David Wagner confirmed the 20-year-old suffered a recurrence of an old problem while on recent international duty with England U21s.
“Unfortunately, this was a very disappointing message for us this week,” Wagner said.
“Kasey came back with some problems from England Under-21s and after we made further investigations we’ve seen this is not a small problem, it’s a bigger problem.
“The injury he had last January, the tendons in his hamstrings, the injury is more or less as big as it was before, so we expect he’ll be out for a longer period.
“Now we have to make further investigations, but he will be out for a few months.”
Palmer is likely to return to Chelsea for a full diagnosis and treatment.
“This is something we have to discuss. We have to find the best solution for Kasey. Everything I hear so far, it will be a few months,” Wagner added.
“This could be January, hopefully less. At the minute it’s too early to give a real time-frame. We need some more investigations but he will, for sure, not be back in the next six or eight weeks.”