By limiting ourselves to just eight names, we are opening up the floor to considerable debate as it is obviously not possible to include all of those sportsmen who are worthy of a place in this countdown.
After much deliberation, we've also chosen Willis from the NFL. A linebacker for the San Francisco 49ers, the former first-round pick is a monster in the gym and keeps himself in formidable shape.
Clearly incredibly dedicated to his craft, Willis is a seven-time Pro Bowl selection who has previously led the league in tackles.
Another we would want to steer clear of in any kind of physical confrontation or challenge.