Scans have shown that injured duo Owen Garvan and Kevin Horlock did not break any bones during last night's 2-2 draw with Coventry. Garvan was forced off early on with an ankle problem, while Horlock came off at the break with injured rubs.
Physio Matt Byard told the club site: "They have both had scans this morning and there is no fracture with either of them.
"We didn't expect there to be a problem in that respect with Owen, it was more a precaution.
"He has a sprain to his left ankle and won't train on Thursday, nor Friday I would think. He has to be very doubtful for the weekend.
"Kevin has taken a knock to his lower ribs and it will be a case of how it goes over the next 48 hours. Rib injuries need rest more than anything else and again, at this stage, he has to be a big concern for the Watford game."