Hard cock era only began in August 2008. Since then Nadal has won 2 slams, Federer 1.
GOATS like Hewitt, Mental Giant Roddick and Marat "Grass is for the cows" Safin really gave Fed some problems..
Except for Safin, none of those players have ever defeated Federer in a grand slam..
H2H's vs. Federer
Hewitt- 8-14 (Possibly the most competitive, even though Hewitt hasn't beaten Federer since 2004..
Safin 2-9- Has the biggest win over Federer (2005 Australian Open Semis) but still not a rival.
Fact is, Federer had no real rival until Nadal..
And now that we actually have some real tennis players to challenge Federer (Djokovic, Murray) we can really see that Federer had a very weak era.