With the eight top-seeded teams already decided well ahead of the 2023/24 draw on 31 August, Erik ten Hag's men can face seven of the sides, with current holders and local rivals Manchester City being the only exception as a fellow English club.
Barcelona, Bayern Munich, Benfica, Feyenoord, Napoli, Paris Saint-Germain and Sevilla are all up for grabs, with United placed into Pot Two following our third-placed finish in the Premier League.
After two days of voting on ManUtd.com and the United App, we can now reveal which European side was the most popular option...
Topping the poll with a whopping 39 per cent were Eredivisie champions Feyenoord, who enjoyed a successful 2022/23 campaign under manager Arne Slot.