The Red Devils advanced to the quarter-finals of the Europa League with a whopping 5-1 aggregate scoreline over the Spanish side, their 1-0 win in the second leg Thursday more than enough to go through.
But the result should not hide the fact that they were overwhelmed for much of the first half and were fortunate not to at least be a goal down.
Joaquin hit the post and David de Gea had to make a towering save from Juanmi as Betis swarmed over United, roared on by a 52,000-strong crowd in Seville.
United, however, could have scored themselves just before the break when Facundo Pellistri hit the post.
Erik ten Hag's side improved thereafter and once Rashford struck his 27th goal in all competitions it was game over for Betis and their former Manhester City coach Manuel Pellegrini.
GOAL rates Manchester United's players from the Estadio Benito Villamarin...