The attacking wing-back galloped into the home box to earn the first-half penalty that was tucked away by Anthony Martial to secure our first away win of the season.
It was the highlight of a composed showing by the young Mancunian in intimidating surroundings, as he defended bravely and won a series of challenges. He also rightly survived a handball shout at the far post towards the end as Partizan sought an equaliser.
MUTV pundits Danny Webber and Sylvan Ebanks-Blake also nominated goalkeeper Sergio Romero and midfielder James Garner, who made his maiden senior start, alongside Williams.