Athletic defeated Mallorca on penalties on Saturday night.
Uriarte said: "He is not only a great coach but also a great person. Having him as a coach when we arrived at the club was an impressive help.
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"An anecdote: I spoke with him in case he needed reinforcements in the summer, but he told me that he was satisfied with the squad.
"He is a very sensible man who knows how to run the locker room in a magnificent way. I am very happy for him. And he is not so calm because in the penalty shootout he wasn't even looking!"