The fine is believed to relate to United receiving five yellow cards in their 2-0 win in Spain, where Luke Shaw, Scott McTominay, Paul Pogba, Harry Maguire, and Nemanja Matic were all cautioned by Portuguese referee Artur Dias.
Uefa’s Control, Ethics and Disciplinary Body decided to mete out a four-figure fine to United that must be paid within 90 days.
Dias’s card-happy officiating was widely pilloried as Granada committed 14 fouls to United’s 12 but only received two yellow cards. United manager Ole Gunnar Solskjaer resisted criticising Dias’s performance.
“Losing three players is not a good position to be in,” Solskjaer said after the game. “I don’t think we deserved those five yellow cards or however many we got, but that’s happened.”
Shaw, Maguire and McTominay are suspended for Thursday night’s second leg while Pogba is a booking away from a one-game suspension.