This. A friend, season ticket holder at OT, and knows his stuff, is worried about Celta. He has mentioned that they are resting players. At full strength they have been good enough to beat Barca and Real this season. They have never won a significant trophy in their entire history, and are all out to win the Europa League. They shouldn't be underestimated.That's technically true, but not really representative - they rested all their big players for the Betis game after winning the Europa 1/4 final, and they rested them all yesterday in preparation for Thursday.
The other game was a 2-1 defeat to Sevilla which isn't exactly a bad result.
I think they've got enough to beat United.