Manchester United started the season with a 1-0 defeat in their first pre-season game against Norwegian side Rosenborg on Monday in Trondheim, Norway.
With the match looking set for a goalless draw, home player Noah Holm scored from the centre of the box with the last shot of the game to give Rosenborg the win.
With numerous players yet to return to the squad following this summer's Euros and Copa America (both finished on Sunday), Erik ten Hag fielded a young side alongside club regulars Marcus Rashford, Casemiro, Mason Mount and Aaron Wan-Bissaka.
Czech goalkeeper Radek Vítek was perhaps the man of the match for the visitors, making a series of saves to keep Rosenborg off the scoreboard until Holm's winner, when United were outshot 22-5.
United are coming off a historically poor 2023-24 season in which they conceded 58 goals and finished eighth in the Premier League.
Ten Hag's side continue pre-season preparations with a friendly against Rangers in Edinburgh, Scotland, on July 20, before embarking on a tour of the U.S. that includes two games in late July in California against Arsenal at SoFi Stadium in Inglewood and Real Betis at Snapdragon Stadium in San Diego.
After returning to England, United will host Liverpool in a final warm-up match at Old Trafford on August 3 and then kick off their season in the Community Shield against Manchester City on August 10. Their Premier League campaign begins on August 16 with a home game against Fulham.
