Over 2.5 goals –

Watford are the Premier League’s top scorers outside the top six, including two goals against Arsenal and Chelsea, and three against Liverpool.

Manchester United are the division’s second-highest scorers, and have only failed to score against Liverpool and Chelsea away from home.

Richarlison to score –

Despite not finding the net at Newcastle on Saturday, Richarlison was still heavily involved in his side’s convincing win, and scored in the Hornets’ last match at Vicarage Road.

Chris Smalling to be carded -

The occasionally-clumsy Smalling was booked for the second time this season against Newcastle 10 days ago, and will have to contend with a pacey Watford frontline, featuring Richarlison and Andre Gray.

Over 3.5 cards -

There have been at least four cards in four of United’s last five away matches, while the last two matches at Vicarage Road have cumulatively featured 13 bookings.