Just wondered what you all think in these different sports, I have come up with 5 in each off the top of my head, but may well have missed some people out. Who do you think is the Greatest ever in all these sports?

100 Metre runners (excluding Drug cheats)

Maurice Green
Asafa Powell
Carl Lewis
Linford Christie
Donovan Bailey

Quarterbacks

Joe Montana
Dan Marino
Otto Graham
Johnny Unitas
John Elway

Tennis Player (Male)

Pete Sampras
Andre Agassi
Roger Federer
Bjorn Bjorg
Rod Laver

Tennis Player (Female)

Martina Navratilova
Steffi Graff
Monica Seles
Billy Jean King
Chris Evert

Snooker Players

Stephen Hendry
Ronnie O'Sullivan
Joe Davis
Alex Higgins
Steve Davis

Footballers

Pele
Maradona
Ronaldo
Eusebio
Zidane

F1 Drivers

Ayrton Senna
Alain Prost
Michael Schumacher
Juan Manuel Fangio
Jim Clark

Golfers

Jack Nicklaus
Nick Faldo
Seve Ballesteros
Greg Norman
Tiger Woods