Cash first came to the tennis world's attention as a junior player in the early 1980s. He was ranked the top junior player in the world in 1981, and in 1982 he won the junior titles at both Wimbledon and the US Open. He turned professional in 1982 and won his first top-level singles title that year in Melbourne. Cash established a reputation on the tour as a hard-fighting serve-and-volleyer and for wearing his trademark black-and-white checked headband and his cross earring. In 1986, he helped Australia regain the Davis Cup with a 3-2 victory over Sweden. Cash again won the decisive singles rubber, recovering from two sets down against Mikael Pernfors. In 1987, Cash reached his first Grand Slam singles final at the Australian Open, where he lost in five sets to Stefan Edberg. This was the last Australian Open played at Kooyong on a grass court. The crowning moment of Cash's career came at Wimbledon in 1987. Having already beaten Mats Wilander in the quarter-finals and Jimmy Connors in the semi-finals, Cash defeated the World Number 1, Ivan Lendl, in the final.

• Birthplace: Melbourne, VIC, Australia
• Residence: London, England
• Height: 6' (183 cm)
• Weight: 185 lbs (84 kg)
• Plays: Right-handed
• Turned Pro: 1982