Chelsea paid £53m to sign talented teenage midfielder Romeo Lavia during the summer transfer window.
However, the midfielder hasn’t played a single game for Chelsea since signing from Southampton in August.
The Belgian broke his ankle in training, and reports claim it would take at least one month to recover from the injury.
Lavia is now expected to return after the October international break. Reports have it that he could be available for the October 21 game against Arsenal.
Speaking recently on Lavia, Pochettino said: “We are really disappointed because he was training really well last week in the international break.
“He twisted his ankle and now we are waiting for the results on Monday from the doctor. We hope it’s not a big issue but in the last week he has not been training with the team.
“It’s a sad situation because he was nearly fit to be involved again with the team. Yes, now we need to wait and hopefully it’s not a big issue for him and the team of course.”