The Everton defnder was shown a yellow card, which was upheld by VAR, for an early foul on Liverpool midfielder Alexis Mac Allister.
Elsewhere, Jose Mourinho grabbed rival manager Okan Buruk’s face amid wild scenes at the end of Fenerbahce’s 2-1 Turkish Cup defeat against rivals Galatasaray.
On-loan Liverpool winger Lewis Koumas fizzed an effort well wide, while Watford went close when Edo Kayembe headed Ince's cross wide and it got only marginally livelier after the restart.
Soccer Football - Premier League - Liverpool v Watford - Anfield, Liverpool, Britain - April 2, 2022 Liverpool's Luis Diaz during the warm up before the match REUTERS/Phil Noble EDITORIAL USE ONLY.