1、从发球开始,到球被击出,球要始终在比赛台面的水平面以上和发球员的端线以外且从接发球方看,球不能被发球员或其双打同伴的身体或其所穿戴(带)的任何物品挡住。 From the start of serve until it is struck, the ball shall be above the level of the playing surface and behind the server's end line. It shall not be hidden from the receiver by the server or his/her doubles partner or by anything they wear or carry.