Imagine that roger federer 2005-or 2006 version shows up ( arguably one of the best performance in the history during a season ) in 2010 season what would happen then ? With biggest treads nadal, djokovic, murray, and del potro secondly cilic, verdasco, tsonga, soderling and other old friends kolya, roddick, hewwit. Its my prediction: GRAND SLAMS: He definetely would win us open, wimbledon and possibly AO open. However he would fail at the RG final against nadal ( ı expect a monster nadal during the clay court season especially at RG ) That makes 4 finals and 3 slams. NO 1: He would end up the season as the world no 1, but not with a wide margin like he did at his peak years. However, definetely bigger margin than this year. MASTERS: He would win 2 or 3 masters because the field is so strong in these days that no chance to win more than 3 masters. TITLES: He might win 10 or more titles. 3 slams, 3 masters, Halle, Basel, Estroil and maybe a couple of more. YEC: I dont know about that. Maybe he would lose YEC because of other players quality and best of three sets. And finally he would lose more than 10 matches. However he would prevail head to head against every other players expect nadal. We already know that nadal creates problem aginst the best roger federer but the other ones ı dont think so because you cant beat that roger standing on baseline and trust your groundstrokes if you are not rafael nadal.