Watford goalkeeper Heurelho Gomes says they're capable of pulling off an upset against FA Cup opponents Chelsea.

Gomes has only lost once to Chelsea in his career and knows another good performance will further his ambition of returning to the Premier League.

He said: "It was not a comfortable time for me because I was used to playing every week.

"I went a long time without any games at Tottenham - but now I have another opportunity at Watford and I want to help this club achieve things.

"I fancy our chances against Chelsea. They are beatable.

"We all know Chelsea are very strong at home but we are playing very well away from home in the Championship and I believe we can do well."