Second-half goals from Moumi Ngamaleu and Theoson Siebatcheu sealed a stunning comeback for Young Boys in their Champions League opener against Manchester United on home soil.
The Red Devils took the lead just 13 minutes into the game through Cristiano Ronaldo, who netted his third goal in two games following his Old Trafford return.
Manchester United looked confident on the pitch, but the turning point came five minutes after the half and hour mark, when Aaron Wan-Bissaka was sent off after a violent challenge on Christopher Martins.
Although the Red Devils had dominated possession in the first half, the scenery shifted after the break with Young Boys taking control and pushing for an equaliser.
The hosts finally managed to get their leveller in the 66th minute through Ngamaleu whose first-time effort ended in the back of the net.
When everything indicated that the game would end in a draw, a Jesse Lingard backpass played in Siebatcheu who took full advantage of his opponent’s mistake, beating David de Gea to help Young Boys snatch all three points late into stoppage time.