Mourinho labelled Tottenham's 6-1 Premier League win against Man Utd as a 'historical victory'.
Tottenham striker Harry Kane says his side 'were really on it' against Manchester United on Sunday.
The England striker, who scored a double against the Red Devils in Spurs' 6-1 thrashing at Old Trafford, was pleased with how they responded after United took the lead through Bruno Fernandes' spot-kick.
"What a day for us," the England frontman told BBC Sport. "We were really on it, mindset wise and in the warm up. We go behind after a minute. But it shows the mindset how we responded. Even after the sending off we had to be ruthless. Second half was about being focused and winning comfortably.
"You never want to go behind early but if you react you can switch the momentum. You have to be up for the big games and be ruthless in both boxes. After that first minute they didn't cause any problems.
"When you play so many games it is difficult but there is competition for places and togetherness. It is the one last push before the break."
Speaking about his form and what he hopes to achieve for the rest of the campaign, he added: "I just want to keep going. As the season go by, score as many as I can. Hopefully a few more before the end."
When asked whether United conceding a red card made a difference, the 27-year-old told Sky Sports: "I think we were on top of the game by then, we had a foothold on it. The fact we took our chances really killed the game."
Spurs' 6-1 win today is Jose Mourinho's first away Premier League victory against a team he has previously managed in the English top flight (previously D1 L4).