The forward, who was the leading scorer in the NBA during the regular season, scored 36 points during the 104-84 win, which levels their first-round playoff series.
The coach told reporters: "You don't get to his level as an NBA player and a great player as he is to have other people motivate you.
"He's self-motivated. He's a tremendous kid and does everything for his team, for our organization. We're proud of him because he gives everything he has. That was the only focus for tonight's game."
The sides play their deciding game in Oklahoma City tomorrow evening.