compiled a 73–37 win–loss record in singles and 53–31 in doubles, achieving a combined ranking of No. 7 in the world in July 2006. Junior Grand Slam results - Singles: Australian Open: QF (2006) French Open: QF (2006) Wimbledon: 1R (2005) US Open: 3R (2005) Junior Grand Slam results - Doubles: Australian Open: SF (2006) French Open: W (2006) Wimbledon: A (-) US Open: 1R (2005) 2006 Nishikori began the year in March with a wildcard entry to the Kyoto Challenger tournament in Kyoto, Japan, where he lost to Australian Robert Smeets in the round of 32 and just failed to qualify for the doubles tournament. In May, Nishikori qualified for the ITF Futures event in Mazatlán, Mexico, where he was victorious in the men's singles. 2007 A finalist in two USTA Pro Circuit events, Nishikori lost to Donald Young in Little Rock, Arkansas and Alex Bogomolov Jr. in Carson, California. He partnered with Young to win the doubles title at Little Rock. At the Sony Ericsson Open in Miami, Nishikori paired with triple French Open champion Gustavo Kuerten, but the two were defeated in the first round. Nishikori served as a hitting partner for Roger Federer at Wimbledon. After his ATP main draw debut in Los Angeles, Nishikori qualified for the Indianapolis Tennis Championships in July. He beat Alejandro Falla in the first round to record his first ATP main-draw win. He followed that up with a three-set win over Michael Berrer, the eliminator of seventh seed Robby Ginepri, to advance to his first ATP quarterfinal. Although he lost to Dmitry Tursunov in two sets, Nishikori became the youngest player to reach the quarterfinals at Indianapolis since Boris Becker in 1985. Later that month, Nishikori headed to Washington, D.C. for his third career ATP event. He defeated Teymuraz Gabashvili in the first round before falling to Julien Benneteau in the second. He qualified for the China Open in Beijing, losing in the first round to Ivan Ljubičić. In October, Nishikori received a wildcard entry to the AIG Japan Open Tennis Championships in Tokyo, where he lost in the first round to Zack Fleishman. He participated in the tournament's draw ceremony and was honored with an award from the Tokyo Sports Writers Club. Nishikori finished the year representing Japan at the Asian Hopman Cup competition in Bangkok, Thailand. 2008: First ATP title Nishikori started the year by reaching the semifinals