SYDNEY, AUSTRALIA - JANUARY 17: John McEnroe looks on during the Legends Exhibition Fast4 match against Pat Rafter during day seven of the 2015 Sydney International at Sydney Olympic Park Tennis Centre on January 17, 2015 in Sydney, Australia. (Photo by Brett Hemmings/Getty Images)

John McEnroe has several radical suggestion to shake up the game of tennis, including, removing umpires.

McEnroe has also suggested players have unlimited challenges and that tiebreaks take place at four all in the fifth and deciding set of a match.

"There should be no umpires as well. That would maybe be a major innovation as well," McEnroe told The Tennis Podcast.

"I'll have to throw that in. That could excite things along with a tighter format, quicker format.

The former hot head of men's tennis is clearly a fan of limiting the influence of umpires, whom he had countless arguments with while on tour, and increasing the use of technology.

"Obviously there would be unlimited challenges and I think you'd see some little bloodbath between the two players."

"Or at least more of sort of this conflict that you saw back more in my day where the players seemed to be going at it more.

"It seems like to me they get along too well.

"In this day and age, people's attention spans seem to be dwindling and the longer the match goes, it seems that it gets less compelling for too many people.

"I think it's too good a sport to not to try to think of ways to interest the fans."