There was talk that Mourinho might give a couple of United's youngsters a chance to shine on the big stage but this was not the case.
Mourinho had a lovely message for his old friend before the game, wishing him the best of luck, expressing his gratitude and admiration for a man he regarded as a student and confidante. However, Manchester United actually kept possession of the ball more so than Watford did. United have one last shot at a piece of silverware as Antonio Conte's side stand in the way. In the end, the game little effect on either team's season.
It was fitting that in his last game, Michael Carrick would once again remind those watching of his unerring knack to pick a pass.
Marcos Rojo nearly presented Watford with a golden chance to level 20 minutes from time when Will Hughes blocked a lazy pass from the Argentine, but the offside flag was raised when Gray made a movement towards goal.
Going into the game knowing second was secured, United built up momentum ahead of next weekend's FA Cup final with a 1-0 win at Old Trafford as Marcus Rashford's first-half goal was enough to see off Watford. He passed right to Rashford and the 20-year-old collected a 13th goal of the campaign.
Chelsea miss out on Champions League
Newcastle deservedly ended a run of four successive defeats under former Chelsea manager Rafa Benitez to earn a top-10 finish. That makes Chelsea's lifeless display all the more worrying. " Newcastle outplayed us and they deserved to win".
Michael Carrick bid a fond farewell to his playing career with a vintage contribution to Manchester United's win over Watford.
Manchester United won the match, but Watford tested Romero multiple times. The Argentinian goalkeeper looked similar to David de Gea when he dove across the goal line to keep the ball out.
"#MUFC announces that assistant manager Rui Faria is to leave the club at the end of the season".
Mourinho confirmed striker Romelu Lukaku would return to training on Tuesday following ankle trouble, good news for the cup final, but was less certain about Martial's situation. The only way to complete this season is to finish with silverware.
Manchester United manager Jose Mourinho reacts during the Premier League match between Tottenham Hotspur and Manchester United at Wembley Stadium on January 31, 2018 in London, England.