Koren was rested on Monday night in the win at Burnley, with Alex Bruce employed as a holding midfielder, but the Tigers manager may want to revert back to a more attacking formation at the KC Stadium.
Bruce is expected to be without midfielder Corry Evans again as he sustained a thigh strain in the warm-up ahead of last week's defeat at Crystal Palace.
Defender Abdoulaye Faye (calf) has shaken off his recent injury and is pushing for a recall, as is striker Jay Simpson.
Sone Aluko and Matty Fryatt remain sidelined with Achilles tendon injuries.
Hull trail leaders Cardiff by four points in second place having won five of their last seven league games.