Question: who is considered the best tennis player of all time
Answer: Rank Name Gender Nationality Grand Slam tournaments Pro Slam tournaments Total Slam tournaments Roger Federer SUI 20 0 20 Rod Laver AUS 11 8 19 Steffi Graf GER 22 0 22 Martina Navratilova TCH / USA 18 0 18 5 Pete Sampras USA 14 0 14 6 Rafael Nadal ESP 17 0 17 7 Björn Borg SWE 11 0 11 8 Margaret Court AUS 24 0 24 9 Chris Evert USA 18 0 18 10 Billie Jean King USA 12 0 12 11 Don Budge USA 6 10 12 Andre Agassi USA 8 0 8 13 John McEnroe USA 7 0 7 14 Serena Williams USA 23 0 23 15 Jimmy Connors USA 8 0 8 16 Bill Tilden USA 10 14 17 Roy Emerson AUS 12 0 12 18 Ivan Lendl TCH 8 0 8 19 Monica Seles YUG / USA 9 0 9 20 Ken Ros