Kenny McLean will miss tomorrow's FA Cup fourth round game at Barnsley having tested positive for COVID-19.
Bali Mumba has returned to team training after his period of isolation, meanwhile.
"Adam Idah has returned to the training ground and is finishing his rehab procees," Daniel Farke added, "so we expect him to be back in full training next week.
"Xavi Quintilla has much improved but has to be patient."
Todd Cantwell is also unavailable for Barnsley with a back problem that he felt in the final minutes of Wednesday's game against Bristol City.
Daniel Farke also confirmed that this weekend's game comes too soon for Teemu Pukki and Christoph Zimmermann, but he hopes that the latter could return for the visit of Middlesbrough at the end of January.