Watford were left to rue a host of missed chances as they were held to a draw by Rotherham in the Championship.
Mario Gaspar hit the outside of the post early on for Watford before Shane Ferguson gave the Millers the lead as he blasted in from close range.
Vakoun Bayo grazed the Rotherham bar soon after while Matheus Martins also struck the upright for the Hornets shortly after the restart.
Watford eventually levelled as Joao Ferreira marked his first start with a long-range effort but Gaspar, Ismaila Sarr and Yaser Asprilla all missed late chances, while Tariq Fosu also went close for Rotherham on his debut.