1. Take the ball out of Tony's hands, and have him run the baseline, a la Ray Allen. RUN THABO'S ING LEGS OFF trying to keep up. He's a MUCH better on the ball defender than off the ball, and the bonus is tired legs lead to short shots.
2, When they go small, IMMEDIATELY move Tim to the high post and post up Diaw on Durant. Diaw can score in the paint, or be the spoke of the wheel, finding cutters and spot up shooters. Back him down, Make him use his legs to hold post position. Tired legs lead to short shots. Playing Diaw on the perimeter against KD plays to KD's strengths. Playing Diaw in the post plays to KD's weaknesses. He's not strong at all, and Diaw has that big ol' butt to keep banging into him and backing him down.