Who is the Greatest Sportsmen of the Modern Era?

Who is the greatest sportsman of the modern era? In this great value book Michael Jordan, Lance Armstrong, Andre Agassi, Michael Schumacher, Tiger Woods, and Valentino Rossi are analysed in seven detailed biographies; they are then compared against each other in the categories of Dominance, Popularity, Mental Toughness, Athleticism, Achievement, and Longevity to determine an overall winner.