Lleyton Glynn Hewitt (born 24 February 1981) is an Australian professional tennis player and former world No. 1. He is the last Australian to win a mens singles Grand Slam title.
In November 2001 Hewitt became the youngest male ever to be ranked No. 1 in the world in singles at the age of 20 years, 8 months and 26 days. He won 30 singles titles and 3 doubles titles, his highlights being the 2001 US Open and 2002 Wimbledon mens singles titles, the 2000 US Open mens doubles title, back-to-back Tennis Masters Cup titles in 2001 and 2002, and the Davis Cup with Australia in 1999 and 2003. Hewitt reached the final of the 2004 US Open, where he was defeated by Roger Federer in straight sets. Between 1997 and 2016, he contested twenty consecutive Australian Open mens singles tournaments, reaching the 2005 final where he was defeated by Marat Safin in four sets.