i played alot of tennis on har-tru clay, the green stuff. never played on red since im in the US. keep balanced and try to slide into ure shots. ull recover faster. alot of people run like a maniac and when a ball is hit behind them they try to recover and end up falling or slipping. when u first start the match and the clay is damp the ball will be nice and slow. then when the court dries up to bits and pieces itll get very fast and the balls will skid and bounce weird. ull have to watch the ball more closely when its dry and do some serious footwork to get into position. if u play something who puts alot of funky spin itll be very random on clay when it bounces.