Yamal, during an interview for the King's League, declared Real Madrid "always steal" when joking on stream.
The claim hasn't gone down well inside Spanish football and Xabi was asked about the teen's claims this morning.
He began, "It is clear that a Clásico is special, and it has been for many years. It is a first for this new project, and we need the stadium to have that energy of the big matches...
"We must be ready, play at the highest level and have the necessary energy."
Xabi then said, "Lamine Yamal 's statements? Are you still talking to me about that? I won't dwell on it. What matters is how we play tomorrow. There are a lot of statements from people at Barcelona and I can't analyze them all.
"There are times for everything. The players have to be ready. I'm not thinking about anything else."