来源：The New York Times
网址：http://tinyurl.com/yccg2oyc
The Key to the Resurgence of Nadal and Federer? Watch Their Second Serves
第二次发球是费纳复活的关键？
The resurgence of Rafael Nadal and Roger Federer this season is all about
turning a liability into an asset.
费纳今年的复活的全在于将“负债”变成“资产”。
If tennis were investing, these two would be the master traders of 2017, the
best on tour at taking a losing stock and turning it into a winning one.
如果将网球比喻成投资，费纳两人今年要算是投资大赢家，把赔钱的股票变成赚钱的股
票。
The stock in focus is second serves.
他们买的“股票”主要集中在二发。
Second serves are generally underrated, underperforming and under the radar
when it comes to the discussion of tennis greats. Second serves for most of
the tennis market are a speculative stock, but not for Nadal and Federer.
当在讨论网球的伟大球员时，二发的表现被低估，也不是努力的标的，大家也没有在看
重。二发在网球股票市场里是投机股，但对费纳两人来说不是。
Nadal, who returned to the No. 1 ranking this week, and Federer, who is
ranked third, have hoarded the Grand Slam singles titles this year and are
among the favorites at the United States Open, which begins on Monday.
纳豆在本周登上世界第一，费德勒排名第三，两人包下今年大满贯赛的冠军，而在下星期
一开打的美网，两人也是被视为热门。
There is only one serve, return or “under pressure” statistic on the ATP
Tour in which Nadal and Federer are ranked one-two this season: second-serve
points won.
在ATP赛的统计里面，关于发球的部份，纳豆跟费德勒在其中一个项目是排名一跟二：二发
得分。
Nadal has won an impressive 61 percent of his second-serve points this season
to lead the tour. Federer is right behind, having won 60 percent. Each player
’s career average is 57 percent, and Nadal in particular has improved from
last season, when he won 54 percent of his second-serve points.
纳豆本季的二发得分机率是61趴领先；费爸是60趴紧追在后。两人生涯平均是57趴，但是
纳豆今年改善很多，去年他的二发得分机率是54趴。
They double-down on making a derivative of their game a peak performer. The
rest of the tour tend to struggle mightily.
他们在二发的“加码投资”成为赚分利器；其他的球员则是苦苦追赶。
Take the 2016 United States Open as an example.
拿2016的美网做例子。
Performance behind first serves in New York in the men’s draw last year was
outstanding, as always. There were 15,749 first serves hit in the court, with
the server winning 11,209 of them, accounting for a dominant win percentage
of 71 percent.
男子选手首发表现亮眼，总共15749次首发，得了11209分，得分机率是71趴。
First serves are a cash cow, a stalwart of the portfolio.
首发是个赚钱的股票，是网球股票投资组合的亮眼标的。
At the 2016 Open, second serves were a losing prospect. There were 12,256
second serves hit last year, with the server winning 6,049 of the points, or
49.3 percent. Returners won more points than servers did when the point
started with a second serve.
二发在2016的美网，就是个赔钱货惹。总共12256次二发，得了6049分，机率是49.3趴。接
二发的球员得分还比发二发的球员得更多分。
Winning points behind first serves is a given. Winning points behind a second
serve is a privilege.
拿到一发的分数是一定的，但是拿到二发的分数可就是优待了。
At the 2017 Australian Open, Federer won the tournament on the strength of
winning 55 percent of his second-serve points. Nadal won the next Grand Slam
event, the French Open, winning a ridiculously high 74 percent of his
second-serve points. Federer then won Wimbledon, winning 67 percent of his
his second-serve points.
在2017年的澳网，费爸二发的得分机率是55趴；纳豆拿下接下来的法网，二发的得分机率
是不可思议的74趴。费爸拿下之后的温布顿，二发得分机率是67趴。
Talk about a return on investment.
这投资真的是赚。
Second-serve performance is crucial to winning Grand Slam tournaments because
second serves are the gateway for the returner to win crucial return points
to break serve.
二发对拿下大满贯赛是至关重要的，因为二发对接球者来说是拿下分数，可以破发球局的
关键。
Nadal and Federer direct their second serves primarily at their opponents’
body on the backhand side, trying to jam them up while staying away from the
danger of the centerline and sideline, and also staying clear of the opponent
’s more potent forehand return.
费纳的二发基本上都是打向接球者的反手靠身体方向，要挤压到对方，也让他们离开中线
跟边线，也让对方无法用比较强的正手接击。
Federer’s right-handed second serve is hit with topspin, kicking up high
into the body on the backhand side of the returner. Nadal’s left-handed
second serve is all slice, or side spin, either meant to move away from the
returner, or chase him as he tries to move away from it.
费爸的右手二发转速极快，反弹后会跳的很高，打向对手的反手；纳豆的左手二发则是球
的路线会弯曲，要嘛会往外打离对手，不嘛会往对手身上过去，导致对手得躲开还击。
For Nadal or Federer to win again in New York this year, performance behind
their second serves will matter more than their scorching forehand winners,
aces or adventures to the net.
所以若是费纳今年想赢得美网，他们的二发将会比他们的强力正手，发球Ace，或者网前得
分等还要更重要。
Second serves are where the smart money lives. Over time, the best gains are
accrued by limiting losses, and that is what separates Federer and Nadal from
the field this year.
二发是投资的好标的。长时间下来，最大的收益会来自于减少失分，那也就是费纳今年跟
其他选手不一样的原因。