Jose Mourinho believes his former club Chelsea will be crowned Premier League champions, but could not help having a little dig at them.
United were in full control of the match and they finally got a second goal on the hour mark when Martial showed his class to place the ball into the back of the net to end the game as a contest.
"It is very, very hard".
The attacker was reduced to a watching brief in United's previous two matches. We know that we have a squad that, like every squad, needs changes. He was a real threat all day, he was lively and did things at pace, but he did real intelligent things.
That miss though didn't prove costly as a minute after that miss, Mata got the opening goal of the game. "That will give him the confidence to kick on".
And Mata was "very happy" with the way United produced a convincing performance to down Watford. Because if he trains like he did in the past two weeks, he performs - naturally - like he did today or even better.
"During the game, I kept shouting at him to attack the defenders and go one-on-one".
It's a bit sad that The Special One continues to work so very hard to turn Chelsea fans against himself.
Zlatan Ibrahimovic had a chance to give United the lead in the opening moments when a deflected Antonio Valencia cross fell for him, but the Swedish striker miscued his volley and saw the effort bobble wide of the post. The 35-year-old Ibrahimovic, whose one-year club option hasn't yet been picked up, has scored 15 goals in league play so far, tied with Chelsea's Diego Costa for second most behind Everton's Romelu Lukaku (16).
"I try always to be objective and not to participate in trying to bring in players that are impossible".
United chiefs are reported to be impressed with the former Chelsea manager's impact at the club, despite the fact they are now outside the top four on the table.
Mourinho said: "We needed to win".
"It was a big result". I have been lucky enough to win so many trophies already. Someone obviously has to drop points, and you have to make sure you capitalise when that happens. They had however drawn three games on the run before beating Leicester City comfortably 3-0 last weekend.