QPR boss Neil Warnock has reported no new injury worries and is expected to stick with the side which beat Cardiff 2-1 in the top-of-the-table clash a fortnight ago.
Heidar Helguson is fully fit after a neck injury but will have to settle for a place on the bench again with Rob Hulse currently preferred in attack.
Tommy Smith will start alongside Hulse against the club where he began his career and scored 36 goals in 167 appearances.
Defender Peter Ramage and midfielder Akos Buzsaky are still sidelined with knee injuries along with another ex-Hornet, winger Lee Cook.
Watford midfielder Michael Bryan is back in contention for the tough trip to leaders QPR.
Bryan missed the 3-2 home win over Leicester last week with an ankle injury but has overcome the problem to make himself available for the short trip to Loftus Road.
Manager Malky Mackay is unlikely to make changes from the XI which beat Sven-Goran Eriksson's men, though, with Will Buckley operating in a role just off central striker Danny Graham.
Teenage midfielder Piero Mingoia is the only other concern as he continues to struggle with a thigh injury but it is unlikely he would have been involved anyway.
Former Hornets favourites Tommy Smith and Heidar Helguson could both be in Neil Warnock's QPR side but a third former Golden Boy Gavin Mahon has not featured this season.