Let's avoid sports that are really only specific to certain nations of regions. So we'll have to exclude my favourite sport Rugby, along with Cricket and most American sports like Baseball, Gridiron etc. I'm talking about the guys who are recognisable anywhere; Pele Ali Tyson Woods Borg etc. So of the greatest players in the world. Who is the greatest. Choose from any era. You can only choose one. Please also give the justification for your choice. I will total up choices and give results periodically.