Chelsea boss Mauricio Pochettino says Romeo Lavia's return to fitness has no set date.
Lavia is yet to debut for Chelsea having arrived injured in the summer from Southampton.
Pochettin said: "Lavia and (Christopher) Nkunku are still out.
"There is no timeframe for them, it is difficult to say because we need to assess them day-by-day. They are in a good condition, Nkunku a little bit ahead of Lavia.
"He was doing things with the group last week but it is still not a full recovery to be part of the squad."