How many millimeters does sports photography take in table tennis competition?

It's best to choose a telephoto lens of more than 200mm, because the photographer can't enter the venue during the game, and the players should be photographed face to face, so the distance should be counted as the distance of a table tennis table. Choosing a telephoto lens can get a better depth of field, knowing that the exposure composition is correct, the photographer's expression is full when capturing, and the photos are basically qualified.