He served 17 double faults.

他有17次双发失误。

《柯林斯英汉双解大词典》

He has served a number of double faults in this set.

他在这盘发球出现了一些双误。

《牛津词典》

He served too many double faults.

他出现了过多的两次发球失误。

youdao

"I just didn't have a spark, " stated the 23-year-old Russian, who served up eight double faults.

BBC: Caroline Wozniacki

Dementieva served 19 double faults against Japan's Akiko Morigami but still came through 6-3 4-6 6-3.

BBC: SPORT | Tennis | Davenport struggles through again

But, in contrast to last week, the 21-year-old made numerous unforced errors and hit as many double faults as aces.

BBC: Novak ends Federer run