Who is the greatest GOAT of them all? And how do you measure greatness, anyway? We invited our writers to rank their top 10 greatest athletes of all time, then compiled a top 50 based on their votes.
Roger Federer has taken a rare foray into the GOAT (greatest of all time) debate, calling Serena Williams "one of the greatest, if not the greatest tennis player of all time" across the sport.
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