Michael Grenfell "Mike" Davies (9 January 1936 – 2 November 2015) was a Welsh professional tennis player, entrepreneur and administrator.

[2] He played on the British Davis Cup team with Bobby Wilson, Billy Knight and Roger Becker.

Soon Davies found himself doubling up as the tour's spokesman and selling the upcoming events and taking the first steps towards a flourishing career in the promotion of tennis as a business.

[6] They had eight contracted players and promoted them as The Handsome Eight: Dennis Ralston, Butch Buchholz, Pierre Barthès, John Newcombe, Tony Roche, Nikki Pilic, Roger Taylor and Cliff Drysdale.

After a couple of years, WCT bought the contracts of the other professional players at the time, including Rod Laver, Ken Rosewall, Roy Emerson, Andrés Gimeno and signed former amateurs Arthur Ashe and Stan Smith to professional contracts.

In 1970, Davies put together the plans for the first million-dollar tour: 20 tournaments throughout the world, played in 20 cities, 32 players under contract, each receiving $50,000.

In 1987 Davies joined the International Tennis Federation (ITF) and later moved back to London as general manager and marketing director.

[3][4] He was made a full member of the All England Lawn Tennis and Croquet Club at Wimbledon in 1990–30 years after they had withdrawn his membership.

Davies has been inducted in 2012 to the International Tennis Hall of Fame for his role in the transformation of the sport into a world-wide concern.