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在网球比赛中,发球是比赛的开始。与接发球、截击和底线球相比,它在比赛中的使用频率为100％。尤其在当今高水平网球竞赛中,发球比其它三项技术在得分率上都高,占27％(据1996年8月国际网联教练约瑟夫先生提供资料)。因此发球在比赛中有着非常重要的作用。 发球一般被分为三种,在比赛中被使用的频率分别为:平击发球占全场比赛发球次数中的15％;侧旋发球占25—30％;上旋发球占50—60％(参考数据来源同前)。通过自己近两年来观察后发现,目前
In tennis games, serve is the start of the game. It is used 100% of the time in the game, compared to the starting serve, the interception and the bottom line. In particular, in today’s high-level tennis tournament, serve has a higher scoring rate than the other three, accounting for 27% of the total. (According to Joseph A. Cohen, ITC coach, August 1996). Therefore serve in the game has a very important role. Serve is generally divided into three kinds, the frequencies used in the competition were: flat-serve serve 15% of the serve times; lateral serve 25-30%; on the spin serving 50-60% ( Reference data source with the previous). Observed through their own nearly two years after the discovery, at present