Nikolay Vladimirovich Davydenko is a Russian tennis player who biggest achievements to date are winning the 2009 ATP World Tour Finals and three ATP Masters Series. He was also the semi finalist on four occasions in Grand Slam Tournament: twice each at the French Open and the U.S. Open. Fondly refeered to as "Kolya", he also has a couple of other monikers that he is referred by- "Iron Man" because he plays in more tournaments per year than any other player and "The Machine" due to his aggressive, consistent playing technique. After Nikolay turned professional in 1999, he played mainly on the Futures Tour, where he captured one title and reached three finals. In August of 2000, he won his first Challenger title in Monchengladbach. His performance in his Grand Slam debut in 2001 at the Australian Open caught the spectators eye who were impressed by his talent and ability. In 2002, he captured his fourth Challenger title in Szczecin. Davydenko made huge strides on the ATP Tour in 2003, capturing his second tour title in Estoril. He kept up with his consistent performance and won his third title in Munich in 2004. later that year, he captured his first home-soil victory in Moscow by winning both the singles and doubles. During the clay season in 2005 he captured his fifth career title in St. Pölten, beating home favourite, Jürgen Melzer. Season 2006-2007 saw Nickolay score a victory in Moscow and his first career TMS title in Paris. He also helped Russia win the Davis Cup against Argentina. In 2008, he defeated Rafael Nadal in the final to win his second ATP Masters Series title. At the 2011 BMW Open tournament, he won the final against Florian Mayer, making it his 21st ATP title. His highest world ranking to date has been Number 3, recorded on 6 November 2006.