"These games can be emotional, but we have experienced players who know how to keep calm in such situations," he said.
"We are in good form, after the draw with Spurs we had three clean sheets which was much better than last season and I have watched the video of the Real Betis game and know that in the first half we were fantastic.
"I do not normally say such things about my team, but we made very few mistakes and played really well as a team.
"With this kind of performance we have confidence we can beat any team. Manchester United are a big team, we but can beat them, especially at home.
"I do not like losing games, and I do not like losing twice against the same team as we did last season against United.
"I know Sir Alex is a good manager, so from my point view it would be good to manage a team to beat them."