Liverpool host Leeds on Wednesday in the rearranged clash that was originally scheduled for Boxing Day, and as they were then, Marcelo Bielsa’s side continues to be hit by injury.
The Reds can take another vital step in the title race with a win at Anfield, with a victory cutting the deficit to Man City to three points with the two still to meet in April.
Injuries have plagued the Yorkshire side throughout the season and they will certainly be without key trio Patrick Bamford, Kalvin Phillips and Liam Cooper in midweek.
The defender, who started in the deepest-lying midfield position in the absence of Phillips, took a hit to the head and was bandaged up before playing on, only to develop concussion symptoms.
Koch will now follow concussion protocols and that is likely to enforce a minimum recovery period of six days, which would rule him out against the Reds on Wednesday – likely seeing Pascal Struijk take his place.
Liverpool, on the other hand, are to be without Roberto Firmino and Diogo Jota after both were added to the injury list after the win at the San Siro, although there is optimism over the latter making a comeback sooner rather than later.
Possible Leeds XI: Meslier; Dallas, Ayling, Llorente, Firpo; Struijk, Forshaw; Raphina, Rodrigo, Harrison; James