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
2013 Seve Trophy not play: Justin Rose (world ranking - 5), Rory McIlroy (6), Graeme McDowell (11), Luke Donald (15), Lee Westwood (18), Ian Poulter (20) and Martin Laird (59). The following players qualified but did not play: Henrik Stenson (world ranking - 4), Sergio García (17), Jonas Blixt (35) and Martin Kaymer (42). "3 October 2013" Source: "4 October 2013" Source: "5 October 2013" Source: Source: "6 October 2013" Simon Khan had to pull out of the event through to injury. Under the rules of the event a half was agreed, while Thomas Bjørn sat out the singles. Source: 2013 Seve Trophy