Martial justified Jose Mourinho’s faith by firing Manchester United up to fifth in the Premier League table.
The France international slotted home after Juan Mata had given the Red Devils a first-half lead.
Martial has flitted in and out of Mourinho’s side so far this season.
Anthony Martial scored as Manchester United beat Watford
Manchester United player ratings against Watford
Sat, February 11, 2017
Express Sport brings you our Manchester United player ratings from their clash with Watford at Old Trafford
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How did the Manchester United players rate during their clash with Watford?
Anthony Martial has seemingly quashed talk over a move away
Certainly, he has struggled to live up expectations after shining under Louis van Gaal last term.
European duo Sevilla and Paris Saint-Germain have been backed to sign him at the end of the season.
But Martial’s celebration suggests he’s happy to stay at Old Trafford.
The 21-year-old thumped his chest after scoring against Watford – in a visible display dismissing claims he wants to leave the club.
This has made my day. pic.twitter.com/hGag1wDVP4
— 🙂 (@ManUnitedFanII) February 11, 2017
Anthony Martial has now scored three league goals this season
Mourinho discussed his decision to select Martial after the game.
"Martial deserves the chance,” he told the BBC.
“He has worked harder than ever in the last two weeks in the way I like – silence but hard."