Bruno Fernandes first Manchester United goal set his new club on their way to a comfortable home win against relegation-threatened Watford and into fifth in the Premier League.
Fernandes scored his first goal for United from the penalty spot.
The goal ended a 236-minute wait for a United home goal in the Premier League after they had failed to score against Burnley and Wolves.
Anthony Martial scored an excellent second on Sunday after Watford’s Troy Deeney had a goal ruled out by VAR for handball in the build-up.
Mason Greenwood, 18, lashed home his 11th of the season 15 minutes from time to complete United’s scoring. Fernandes said it was a dream to score at Old Trafford.
While Ole Gunnar Solskjaer’s men have now moved into the top five, Watford remain second from bottom.