The defender has missed our last two matches against Burnley and Southampton with a back problem and a virus respectively.
With both Jan Vertonghen and Kyle Walker suspended after reaching five yellow cards, it would be perfect timing for Toby to be available at Vicarage Road.
“Toby is okay,” said Mauricio after training on Friday. “He suffered a virus the day before the game against Southampton and that meant it was impossible for him to be available.
“It was nothing related to his back, he got a virus and now he’s okay, he trained well today and we hope nothing happens between now and Watford and he will be available again.”