The 31-year-old moved back to Belgium in the summer after almost a decade in the Premier League, first with Sunderland and then Liverpool.
Mignolet was part of the Merseysiders’ team which knocked United out of the Europa League, 3-1 on aggregate, at the last-16 stage in 2016, but he says that game won't play too much on his mind ahead of this particular tie.
“It’s a different game, of course,” Mignolet told reporters at the pre-match press conference. “That was a good memory. It was a great campaign for us to go to the final. It’s a completely different fixture tomorrow of course.