Wenger opened his Premier League win account against Mourinho after 13 attempts with a 2-0 win on Sunday.
"I think this game is a plus for them, to play 90 minutes is fantastic because now we have three Premier League games to play plus the semi-final and let's hope we have one more game to play".
But although United have gone 17 European home games without defeat, Celta have scored in all six of their Europa League away matches this season and Herrera says everyone in United red will have to be on their game.
Arsenal manager Arsene Wenger admits that he was "surprised" by the lack of animosity between his side and Manchester United compared to previous editions of the rivalry. I left the Emirates, they were crying. "Impossible. I don't think so", said Mourinho.
There was no way back for United and, for once in a troubled season, the Arsenal fans could relax and forget the will he-won't he concerns about whether manager Arsene Wenger will renew his contract.
Aaron Ramsey gave a man of the match display in the Arsenal midfield and went close to opening the scoring in the first half with a shot that was well saved by David De Gea. I left Highbury, they were crying.
Arsenal face Southampton in the league on Wednesday night and Wenger is set to stick with the desired formation which has seen four wins in five games. They were walking with their heads low, so finally they sing, the scarves, it's nice for them, honestly.
"We have had many draws as well and there were some fantastic teams that we played against", Wenger said.
"So, hard to manage it but I think, in principle, the team was good, was organised, played to win and defended well."Arsenal were not better than us in my opinion but congratulations". He is a big manager so to have that record.is something that is not normal", Mourinho said. I'm really satisfied with my performance and the performance of the team, which is most important.
"Hopefully we can get that confidence to take into the final".
"But If we don't qualify for the Champions League, it's because we're not good enough".
However, the former England player believes the Old Trafford club's fortunes will change when Mourinho gets to shape his own squad.
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