The Rangers defender suffered a nasty cut to his cheek after a clash of heads with team-mate Steven Caulker in Wednesday’s 2-1 home defeat to Arsenal.
Boss Chris Ramsey will make a late decision on Onuoha, while Mauricio Isla (knee) and Darnell Furlong (calf) are also doubts.
Tottenham have no injury or suspension worries heading into Saturday’s match at QPR.
Mauricio Pochettino may stick with the same starting line-up for a third straight game, having chosen the same players for the Capital One Cup final and Wednesday’s 3-2 win against Swansea.
Emmanuel Adebayor, Younes Kaboul and Etienne Capoue will be hoping to be involved having not been involved in a matchday squad since January.