Chelsea manager Mauricio Pochettino has expressed disappointment at Romeo Lavia’s injury.
The midfielder joined Chelsea from Southampton this summer
But Pochettino said he does not know when the midfielder will be fit to return.
Lavia is yet to play a game for the Blues after suffering an ankle problem in training.
“We’re really disappointed because he was training really well,” Pochettino said at his press conference ahead of their game against Bournemouth.
“In the international break, he twisted his ankle. We hope it’s not a big issue.
“It’s a sad situation because he was nearly fit to be involved.
“We don’t know how long he’ll be out for. We need to assess.”