You got Roger Federer who has won 17 grandslams, has made it to 26 finals of grand slams, won wimbledon 7 times, is arugeabley the most mentally sound athlete in the world, and is currently still #2 in the world at the age of 33. In one of the most competitive sports in which doesn't involve teamwork or coaching. A soccer match is only 90 minutes long. Gland slam matches are pure sprints for 3-5 sets, most lasting 2-4 hours, and then have to play 9 other matches in 2 weeks Vs harder opponents. I just don't see how a soccer player could compare.