first second serve
第一二次发球
以上为机器翻译结果，长、整句建议使用 人工翻译 。
If he does it again, he forfeits a first serve and must hit a second serve.
WSJ: A Little Night Tennis, Anyone?
Robson was able to stay with Jankovic when she made her first serve, but a statistic of just 14% of points won on her second serve held the key to the opening set.
BBC: Wimbledon 2010: Laura Robson beaten by Jelena Jankovic
But the turning point proved to be the first time Baltacha lost her serve in the second set.
BBC: Elena Baltacha, Melanie South & Katie O'Brien go out
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