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 Series in the record for the biggest payday in tennis history, with a total amount of $4 million. The 2017 US Open Series did not feature a Bonus Challenge. In 2018, the "US Open Series" comprises the following tournaments: Note: From 2006 on, only players who earned points in at least two US Open Series events are eligible for the final (Top 3) standings. US Open Series The US Open Series is the name given by the United States Tennis Association (USTA) for a series of North American professional tennis tournaments leading up to and including the US Open. It is