A spate of injuries may force Walter Mazzarri to revert from a three-man defence for this weekend's trip to West Bromwich Albion.
Miguel Britos is suspended and Younes Kaboul is at risk of joining Craig Cathcart on the sidelines with a muscular injury, leaving Watford short at the back for Saturday's match at The Hawthorns.
"We're playing very good with three at the back but now without Britos and Kaboul a doubt we will have to check tomorrow," Mazzarri told watfordfc.com. "[We] will decide at the last moment."
Valon Behrami is also suspended for the Hornets and Ben Watson is doubtful, though Isaac Success is back in training and has a chance of featuring.
See: Mazzarri on players' improvement