losing to Agustín Calleri. In his next tournaments he reached the second rounds of French Open and Stella Artois Championships, and the first round of Nottingham Open. At Wimbledon, Tursunov achieved his best ever performance in a Grand Slam tournament by making the fourth round. In his second-round match against then world No. 9, Tim Henman, he had to play in a Wimbledon club shirt as two of his shirts were stolen from the locker room before the match. He eventually defeated the local hope in five sets, earning his first top-ten win of his career. He eventually lost in the fourth round to Sébastien Grosjean. He then reached the second rounds of RCA Championships and Los Angeles Open, the first rounds of Western & Southern Financial Group Masters and Pilot Pen Tennis and reached also the second round of his next four tournaments including the US Open. At the Kremlin Cup, he was able to reach the semifinals losing to compatriot Igor Andreev. He then won the Challenger event in Kolding, Denmark defeating Steve Darcis. In his last tournament of the year he reached the third round of BNP Paribas Masters losing to Nikolay Davydenko. 2006–2007 2006 was a successful year for Tursunov as he achieved his highest ever ranking thus far, he began by reaching the quarterfinals of Qatar Open and Medibank International losing to eventual finalists Gaël Monfils and Igor Andreev respectively. He then reached the second round of Australian Open to Tommy Robredo. At the Regions Morgan Keegan Championships he lost in the quarterfinals to Tommy Haas. He then won a Challenger event in Sunrise, Florida defeating Alberto Martín. At the NASDAQ-100 Open he was able to reach the fourth round of a Master Series for the first time losing to world No. 1, Roger Federer. He then went 1–6 in his next six events only earning a victory over Gastão Elias at the Estoril Open. At the French Open, Tursunov lost to David Nalbandian after having a 2–0 set lead in the third round. He then reached the quarterfinals of the Queen's Club Championships losing to local hero Tim Henman and the first round of Nottingham Open losing to another local hero Andy Murray. He defeated then world No. 4, Ivan Ljubičić, in the third round of Wimbledon coming back from two sets to love, before losing in the next round. After losing his serve