Career highlights of Australia's former world number one Lleyton Hewitt, who retired on Thursday after being knocked out of the Australian Open:

- Qualified for the Australian Open in January 1997, a month before his 16th birthday, the youngest qualifier in tournament history

- Captured his first title, at his home town in Adelaide, over fellow Australian Jason Stoltenberg in 1998 after stunning Andre Agassi in the semi-final

- Became the youngest ever world number one aged 20 and nine months in 2001, breaking the 69-year-old record set by American Wimbledon champion Ellsworth Vines, aged 21, in 1932

- Won his first Grand Slam title at the 2001 US Open, beating Pete Sampras 7-6 (7/4), 6-1, 6-1 in the final

- Crowned Wimbledon champion a year later, crushing Argentina's David Nalbandian 6-1, 6-3, 6-2 in the final

- Member of two Australian Davis Cup-winning teams, over Spain in 2003 and France in 1999. He played in 41 ties, winning 58 singles and doubles matches for his country between 1999-2015, an Australian record