The U’s come up against a Hornets side sitting sixth in the Sky Bet Championship table, and having won five out of six games at Vicarage Road this season.
We picked out six Hornets players to keep an eye out for tonight.
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Daniel Bachmann
The 30-year-old Austria international goalkeeper is the Hornets captain, and has been at the club since July 2017.
While coming through the Stoke City youth set-up, Bachmann had loan spells at Wrexham, Ross County and Bury, and then joined Watford on a free transfer.
He spent the 2018/19 season with Kilmarnock, and has made 127 appearances for Watford.
Festy Ebosele
The 22-year-old right-sided defender made his professional debut for Derby County in January 2021, and made 41 appearances for the Rams before joining Serie A side Udinese in July 2022.
He played 48 times in Serie A, and then switched to Watford on loan at the end August.
Ebosele has won five caps for the Republic of Ireland.
Edo Kayembe
Although a holding midfielder by trade, the 26-year-old DR Congo international is enjoying a fine season in front of goal so far.
After spells in Belgium with Anderlecht and KAS Eupen, he moved to Watford in January 2022.
This season has seen him bag five goals already in 13 league games.
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Giorgi Chakvetadze
One of the stars for Georgia at Euro 2024, the 25-year-old attacker signed a new five-year deal at the end of September, yet has been linked with a move to Premier League side Wolves in recent weeks.
Initially with Gent in Belgium, he had loan stints at Hamburg, Slovan Bratislava and then Watford during the first half of the 2023/24 season.
The move was made permanent on January deadline day, and he’s made 52 appearances for the club.
Tom Ince
A familiar figure in Championship football, the 32-year-old tends to play more centrally now as opposed to the wide role he occupied earlier on in his career.
After coming through the academy at Liverpool, he signed for Blackpool in August 2011, and scored 33 goals in 113 games.
Permanent moves to Hull City, Derby, Huddersfield Town, Stoke and Reading have followed, while he joined Watford last summer.
Vakoun Bayo
The 27-year-old striker joined the Hornets for a reported £5 million in July 2022, and then spent the second half of the 2022/23 campaign at Charleroi in Belgium.
Seven goals in 42 matches came last season, while five league goals have followed this year.
Four of those though arrived in a 6-2 win at Sheffield Wednesday earlier this month.