But then there's this caveat: in 2011, Nadal was a more achieved player than in 2006, and all the nuances that entails - the aura of entering the season as the best player in the world, coming off a three-slam year, for example. Same thing with Federer: '03-'07 or '04-'08? Arguments could be made for including either '03 and '08 in that stretch. In 2003, it's arguable he was the best player in the world, but was very underwhelming at the majors other than his Wimbledon win. In 2008, bad losses crept up and Nadal started permanently turning the tide, but his major results were far better than in 2003 and he had the 12 major aura to his credit.