They also make the trip armed with the best away record in the division. From a possible 48 points, Zola's men have collected 29 on the road - a return that no side can better or even match.
Hosting Ipswich could do with a Vydra of their own as they battle against relegation.
Mick McCarthy's team have lost more matches at Portman Road this season than they have won. However, they are unbeaten in their last three encounters at home, collecting seven points from nine.
When these two sides last met at Ipswich, Watford ran out 2-1 winners in December 2011.
Possible starting lineups:
Ipswich: Henderson; Cresswell, Chambers, Stearman, Smith; Edwards, N'Daw, Hyam, Murphy; McLean, Chopra
Watford: Almunia; Doyley, Pudil, Cassetti, Nosworthy, Chalobah; Anya, Abdi, Yeates; Deeney, Vydra
Sports Mole says: 2-2