This is (yet) another reason why Federer is so great. He has played through the modern evolution of tennis from a sport that favoured attacking multi-dimensional players to one that favoured players that adopted a counter punching, defence orientated, one dimensional baseline strategy. It is simply incredible that he has managed to adapt and thrive. Anyone who still holds the deluded belief that 2004-2007 is a weak era should start by watching the 2005 Safin-Federer semi final. One of the greatest tennis matches of all time in regard to quality of play.