"We know what it's like to put that much emotion into something," Spoelstra said, having coached the Heat in four NBA Finals on the way to two championships. "And that's really what the fatigue is. It's not the physical fatigue. He's in unbelievable shape. He's ready to play a playoff game as soon as he came back. But when you truly invest emotionally into something, and put yourself out there for the pain or the joy or the criticism or all that stuff, that's something that you can't quantify, but it's there, it's real.