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Ali may be the best thing that happened to boxing.
As he scorched his way to sporting immortality, Jahangir left a trail of over 500 successive victories behind him.
Schumacher's competitive instinct may not have bode well with many, but he stands amongst the greats.
Federer is also the current record-holder for the most wins (six) at the ATP World Tour Finals.
Iniesta is arguably the greatest attacking midfielder, if not greatest midfielder outright, to have graced the sport.
Bursting onto the international scene in 1989, Waqar was one of the pioneers of bowling full and straight.