What would have happened had Hewitt got to the finals of Wimbledon and Safin the finals of the US Open instead of Ferrero? Would this have impacted Federer's ranking much at the end of the 2003 season and the start of the 2004 season? What if Ferrero won their encounter in the semifinals of the 2004 Australian Open? Would Federer have still found it in himself to become #1 after that point, or would he have declined back to being a headcase? What I'm asking is if the players made more of a push back against Federer, would it have impacted his season(s) as much as Nadal did?