How much is having dominant seasons important in determining the Greatest of All Time. As we all know, Roger Federer has had three seasons with a winning percentage over 90%. Rafael Nadal has had zero. Roger Federer has had three seasons of winning at least 10 titles in a season. Rafael Nadal has had one. Roger Federer reached the finals in 16/17 (94%) tournaments in 2006. Nadal reached the finals in 12/21 (57%) tournaments in 2005. Roger Federer has had three seasons where he won three grand slams in a year. Rafael Nadal has had one season where he won three grand slams in a year. (Note: Federer also won the Season Ending Championships in all three years. Nadal lost in the final). Roger Federer has three seasons where he reached the finals of all four grand slams. Rafael Nadal has zero seasons. Roger Federer's best three year run featured a 94.27 winning percentage and 34 titles. Rafael Nadal's best three year run featured a 86.22 winning percentage. Thoughts?