Real Madrid meet Atletico Madrid in tonight's semifinal in Jeddah, Saudi Arabia.
Xabi said in his preview: “We want to play a different game than the league match, but we can't forget the things we lacked that day, things we're clear about.
"We don't want to repeat the same mistakes and we want to play at a higher level. I'm convinced it's going to be something else, different, but we mustn't forget the things that didn't work well.
"You learn from every defeat, and there are things we don't want to repeat from that game, so we'll keep those to ourselves.”
On the Super Cup, he also insisted: “There are two things that are very clear: it’s the most important tournament because it’s the next one, but it’s fourth in order of what we have at stake during the season.
"It’s the absolute priority; we need to play a good match and we’re approaching it with great enthusiasm.”