And Redknapp has backed Moyes to be able to help West Ham pick up a vital three points.
The former Birmingham and Tottenham boss said: “Watford have overachieved this season. I think it’s a good opportunity for West Ham. I think there’s every chance that West Ham will get a positive result there.”
Moyes has promised that West Ham’s players will work harder and run further under his stewardship than they did when Slaven Bilic was in charge.
West Ham’s players have run the lowest distance of any Premier League side on average this season, and Moyes will be aiming to spark a big improvement in that regard.
West Ham are currently in the Premier League’s relegation zone, with their form very poor.
Watford, meanwhile, have been one of the surprise packages in the top flight this term - and currently sit in ninth place.
Watford have lost their last three matches, however, and West Ham will hope that Marco Silva’s side will be low of confidence, after their dip in form.