Tottenham boss Mourinho, speaking to Match of the Day, said: "I don't think it was a performance from another galaxy but we were solid. We needed a game where the players could express themselves against a team that never gives up.
"Until the last minute, we had to defend two corners. We had a clean sheet because we wanted a clean sheet. It's something we've not been having."
On Gareth Bale's performance, Mourinho added: "We know the quality he has. I don't want to say that [he is 100% back to his best].
"We don't need the Gareth Bale of five or six years ago. That player wouldn't be here - he'd be at Real Madrid. He is winning duels and you saw his speed and direction.
"I'm very happy for him, very happy for the team because the team needs his talent. When his condition is good he can do things like today - his game was very good, not just scoring, changing speeds, going inside."