Despite taking charge of both Hull City and Watford since becoming a Premier League manager in January 2017, Marco Silva has only won four games fewer (12) than Manchester United boss Jose Mourinho (16) in this period.
Watford have lost 12 of their last 13 games against Manchester United in all competitions, winning the other in the Premier League in this exact fixture last season (3-1).
Young, a product of Watford's academy, scored with a half-volley and a free kick before Anthony Martial added a third.
Watford rallied, however, with Troy Deeney pulling one back from the penalty spot before Abdoulaye Doucoure turned home with six minutes remaining. Before those successive victories they had gone down to three straight losses in what was by far their most disappointing run of the season so far.
After seeing his victor against Brighton on Saturday go down as an own goal, the opener was Young's first league strike since May 2016.
And against his former club, the 32-year-old delivered a masterclass of a performance in the first half.
GETTY Jose Mourinho's Man Utd got a bloody nose at Watford last season
The first time they successfully fed the Belgian, he played in Lingard, whose pass to Young was thrashed home by the former Watford man to give the visitors the lead. The visitors earned a free-kick for Abdoulaye Doucouré's cynical pull-back on Paul Pogba and the versatile England global dispatched it into the top corner.
Mourinho's reaction to Young's incredible free-kick in the first-half also went down well among United supporters across social media.
Christian Kabasele did not get enough purchase on a clearing header and Lukaku intelligently volleyed the ball into the path of Martial, who adroitly steered a low shot past Heurelho Gomes.
Six minutes later, Young struck again.
It should have been even worse for Watford at the break, but Gomes saved well from Lukaku before jumping to his feet to make an even better stop from Lingard's follow-up effort.
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