Mourinho says San Mames is one of his favourite stadiums.
"I like to play in Bilbao. The stadium has a crowd that is passionate about football and that fervently supports its team. They are harsh on opponents. People who love football and the atmosphere of great games like to play there, and my team does," he said.
"We've recently played in similar stadiums, like Camp Nou, the Calderon and the Reyno de Navarra. Athletic Bilbao play very well, but so do we. We will try to win in order to be champions, but they will do their best to defeat us and prevent us from winning the title at their stadium."