Cape Town - "It'll be a test of how far we've come at an international level, how far the guys have developed and improved," Di Matteo said.
"Obviously Real are the favourites over the two games but I think we have a bit more experience of these games now and hopefully we can show that tomorrow."
Di Matteo replaced Jens Keller as Schalke manager in October and guided the German side to a second-placed finish in their group behind his former team Chelsea.