Martin Kaymer golfer in the world, making him only the second German (after Bernhard Langer) to be the top-ranked golfer in the world. At the time he was the second youngest to reach world number one behind Tiger Woods, soon surpassed by Rory McIlroy in March 2012, who gained the top ranking at age 22. In April, he relinquished his number one ranking after eight weeks to Westwood, who won the Indonesian Masters. After reaching the number one ranking, Kaymer decided to undergo a swing change to be able to move the ball both ways. Frustrated with his disappointing results at the
US Open (tennis) money (US$40,912,000) accounts for 80.9 percent of total player base compensation, while men's and women's doubles (US$6,140,840), men's and women's singles qualifying (US$3,008,000), and mixed doubles (US$505,000) account for 12.1 percent, 5.9 percent, and 1.0 percent, respectively. The prize money for the wheelchair draw amounts to a total of US$350,000. The singles winners of the men and women draws receive US$31,200 and the winner of the quad singles receives US$23,400. The United States Tennis Association in 2012 agreed to increase the US Open prize money to US$50,400,000 by 2017. As a result, the prize money for the 2013 tournament was