Joao Pedro's brilliant late winner gave Watford a 1-0 win at Derby to increase the pressure on Rams boss Phillip Cocu.
The teenage Hornets forward curled in a sensational effort from just outside the area with 15 minutes to go to settle a match bereft of clear cut attacking chances.
Earlier in the second-half, Watford were incensed they were not awarded a penalty after Nathaniel Chalobah's effort appeared to strike Derby defender George Evans on the arm.
Wayne Rooney had a golden chance to level after Pedro's curler, but the former England captain curled wide when played through one-on-one.