Darren Cahill (born 2 October 1965 in Adelaide, Australia) is a tennis coach and former professional tennis player from Australia. He was an Australian Institute of Sport scholarship holder.

Nicknamed "Killer", Cahill turned professional in 1984. He won his first tour doubles title in 1985 at Melbourne, and his first top-level singles title in 1988 at Gstaad.

Cahill's best performance at a Grand Slam event came at the 1988 US Open, where he knocked-out Boris Becker in the second round on the way to reaching the semi-finals, where he lost to eventual champion Mats Wilander.

In 1989, Cahill finished runner-up in the men's doubles at the Australian Open (partnering Mark Kratzmann).

Cahill was a member of the Australian team which reached the final of the Davis Cup in 1990. (The team lost 3–2 to the United States in the final.) Cahill compiled a 6–4 career Davis Cup record (4–0 in doubles and 2–4 in singles).

Cahill won his last tour singles title in 1991 at San Francisco. His last doubles title came in 1994 in Sydney. His career-high rankings were World No. 22 in singles and No. 10 in doubles (both achieved in 1989). Cahill retired from the professional tour in 1994 due to a knee injury.

Andrew "Andy" Murray (born 15 May 1987) is a Scottish professional tennis player, ranked No. 4 in the world, and was ranked No. 2 from 17 to 31 August 2009. Murray achieved a top-10 ranking by the Association of Tennis Professionals for the first time on 16 April 2007. He has been runner-up in three Grand Slam finals: the 2008 US Open, the 2010 Australian Open and the 2011 Australian Open, losing the first two to Roger Federer and the third to Novak Djokovic. In 2011, Murray became only the seventh player in the Open Era to reach the semi-finals of all four Grand Slam tournaments in one year.

Andy Murray was born to Will and Judy in Glasgow, Scotland. His maternal grandfather, Roy Erskine, was a professional footballer who played reserve team matches for Hibernian and in the Scottish Football League for Stirling Albion and Cowdenbeath. Murray's brother, Jamie, is also a professional tennis player, playing on the doubles circuit. Following the separation of his parents when he was nine years old, Andy and Jamie lived with their father. Murray later attended Dunblane High School. Murray is in a five-year relationship with Kim Sears, who is regularly seen attending his matches. The relationship ended briefly in 2009 before they reconciled a short time later in 2010.