The Dutchman, who scored 150 United goals in his five years as a player, stepped up into the role after Erik ten Hag’s departure on Monday. Van Nistelrooy had joined Ten Hag’s team this summer, eager to help move the club forward and compete for major titles.
Serving as interim for the short term while a permanent manager is appointed, van Nistelrooy’s first game saw United score five goals in an entertaining Carabao Cup fixture at Old Trafford.
Doubles from captain Bruno Fernandes and Casemiro, plus a sixth goal of the season from Alejandro Garnacho, saw the Reds progress into the quarter-finals.