Donald Oliver Young Jr. (born July 23, 1989) is an American professional tennis player. Young had a career-high ATP singles ranking of World No. 38 achieved on 27 February 2012 and doubles ranking of No. 43 achieved on 14 August 2017. As a junior he was ranked No. 1 in the world in 2005. His best singles performance in the Grand Slams was reaching the fourth round of the 2011 US Open, as well as the 2015 US Open. In doubles he reached the final of the 2017 French Open partnering Santiago González. Early life Young began playing tennis at age three with mother, Illona, and father, Donald Sr., who are both tennis teaching professionals. Career Junior and early career In 2001 he came in second to Jesse Levine in the U.S. Clay Court 14 Nationals in Fort Lauderdale, Florida. He was up 5-love in the third set of the final. Young had lost the first set, won the second, and was winning 5–0 and serving for the match at 40–15. Levine scored 23 consecutive points to defeat Young 7–5. In 2003, Young won the Orange Bowl 16-under title (defeating Thron), becoming the first American to win that age division title since Jim Courier in 1986. He turned professional in 2004; he played ATP Tour, Futures and Challenger events. Due to the slow start, his handlers were often criticized for pushing him too fast during the early stages. In 2004, Young reached the Orange Bowl 18-under final (l. to Neilly). He won the Easter Bowl 14s and 18s titles in 2003 and 2004 and was named as Davis Cup practice partner for the quarterfinal tie against Spain in 2007. Young was, in 2005, ranked the No. 1 junior player in the world. Young was the youngest male to win a Grand Slam event, winning the Australian Open Junior Championships in 2005. Young also won the U.S. Open Junior Doubles Championship with Alex Clayton. In 2005, he became the youngest year-end World No. 1 in junior rankings ever at 16 years, 5 months (one month younger than Richard Gasquet in 2002). Young won the Australian Open junior title at age 15 to become youngest-ever and first African-American man to be ranked No. 1 in the world. He was also the first American to win the Australian junior title and finish No. 1 since Andy Roddick in 2000. He advanced to the