Watford head coach Marco Silva also sent on midfielder Andre Carrillo, shifting to a back four, and his side began to look more risky, Richarlison heading wide from another Femenia cross.
It was another zero-sum weekend for Manchester United as they edged past Brighton & Hove Albion on Saturday only to watch on as Manchester City regained an eight-point hold at the Premier League summit with a 2-1 success at Huddersfield Town 24 hours later.
Young's top displays of late saw him recalled to the global senior team and the player does not look like he'll be stopping anytime soon.
Anthony Martial then made it 3-0 in the 31st minute, calmly slotting the ball under Heurelho Gomes after having been set up by Romelu Lukaku. At the heart of the defence, Marcos Rojo and Eric Bailly may both return, potentially giving Chris Smalling and Victor Lindelof a midweek off.
"They are doing well in the league so we know it is going to be another tough game". Their last two games against West Ham and Newcastle have been their brightest defensive games of the season, against two offensively lackluster teams.
But they'll have to do without giant midfielder Fellaini for the game.
Sadio Mane and Roberto Firmino On Bench - Liverpool Team vs Chelsea Confirmed
West Brom appeared set to make a winning start to life without Tony Pulis when they took a fourth-minute lead through Salomon Rondon.
Jose Mourinho was a relieved man as Jesse Lingard put Manchester United out of sight with the side's final goal in a dramatic 4-2 victory over Watford.
Meanwhile, Manchester Evening News have reported that three other first-team players have missed the trip to Watford.
The absence of Fellaini, in particular, is baffling, with the Manchester United boss hailing him to be one of the most important player's in his squad, despite his contract standoff with the club.
Romelu Lukaku could make his 200th Premier League appearance in this match - he now has 93 goals.
THIS match takes place on Tuesday, November 28 at Vicarage Road. Only 10 players have scored more goals than this in their opening 200 appearances in the competition, with Alan Shearer (145) leading the way.