"How to say 'play tennis' in English?" is the question you asked. Here's a short answer:
The English phrase for "打网球" is "play tennis". This can be used in various contexts, such as when talking about playing the sport itself, or when referring to someone who plays tennis.
If you want to emphasize the physical act of hitting the ball with a racket over a net, you could say "hit the tennis ball". If you're asking someone if they play tennis, you could say "do you play tennis?".
I hope that helps! Let me know if you have any other questions.
