However, Nkunku being fit and available after injuring his knee in pre-season would prove a huge boost for Chelsea.
The £52million summer signing has been nearing a return to fitness for some time and narrowly missed out on the trip to Newcastle.
— Sky Sports Premier League (@SkySportsPL) December 1, 2023
Pochettino has updated fans after Nkunku was spotted in the team warm-up for training by Sky Sports, with the full session then taking place once the TV cameras were switched off.
A club statement said the Frenchman continues to "progress with the reconditioning phase of his rehabilitation", suggesting he will not play on the weekend.
However Pochettino said a late fitness test will determine whether Nkunku will be available.
Romeo Lavia is also in a race against the clock while he too awaits his long-awaited debut for Chelsea.
The right-back's return could come at a crucial time with both Reece James and Marc Cucurella suspended for the game against Brighton.