Our bike fitter was against 0 degree float with such a young cyclist. I specifically asked him. Your observation regarding Keo pedals is on par with our track sprinter I talked to, who was World Cup medallist. But he was able to produce 2000 watts.
Regarding tennis, I've been playing amatoeur tournaments for over 30 years. I once played a guy who was serving 180 km/h. It was devastating
