In 2010, Rafael Nadal became the first man in world history to win slams on clay, grass AND hard-court all in a calendar year. His run included winning Roland Garros without dropping a set (and wiping the floor with the now-retired soderling after a 2009 loss). He won the channel slam and won the US Open title being broken only 5 times, a record shared with andy roddick, and became the youngest player in the open era to win the career grand slam (at the age of 24) and also became only the second player to win the career golden slam (4 slams + Olympic gold in singles). roger federer won 3 slams in 2006. Which was the greater achievement?