"Obviously, we're aware they're a good team," admitted Butt. "We've had them watched and saw the DVDs. They're a typical Spanish team, they are not giants but all smallish lads, and they move the ball and manipulate it well.
"They have got two or three outstanding players so it's going to be a big challenge to us.
"But we're very confident. If we can play to our maximum, we can compete and beat any team really and that's how we feel. They're only young lads and just need to learn we have to play for the whole 94-95 minutes or whatever it is. It's a learning curve and we'll benefit from every experience we get in these games but, ultimately, we want to win them all as well.
"We need to cut out silly errors that, no matter where you play in the world, you shouldn't really be making. That's the concern at the minute as errors have been made and we've not done ourselves justice for the whole match. I think we're better than what we've shown in the last two games."
Butt is hopeful of a good turn-out at the AJ Bell Stadium with the 2pm kick-off allowing plenty of time for fans to take in both the Under-19 game and the senior encounter at Old Trafford.
"A few schools are on holiday now and it's a great game for people to come and watch," he explained. "Hopefully, we'll get a good crowd as there will be no rushing to get to the game afterwards.
"We need some support for the lads as it's a massive game for them and part of their learning curve where playing in a stadium with fans is obviously going to be important if they end up playing a high level either at this club or anywhere else. So it's more the merrier and let's hope for a real atmosphere."