I tested this game on my CPC6128 with a type 1 CRTC and the ball behaves very weirdly when my opponent hits the ball; once the ball crosses the net into my side of the court, it reappears suddenly at another point of the court where I cannot reach it in time, which makes the game unplayable.
I have also tested the game in the Arnold and CPCEC emulators and the movement of the ball is extremely jerky, as if the game is skipping a lot of frames.