I've never been able to get UE for Kuerten-Federer at RG but I've found them, and a few other stats, at http://tennis.matchstat.com/index.ph...n&Id_Player2=1
Kuerten - 24.7%
Federer - 18.3%
It was a well played match, though there's something funny about the winner/error differentials. Federer's (+8 ) is higher than Kuerten's (+4): so if Kuerten did not get ahead by winners and UE's alone, he must have gotten a large margin over Federer in the category of forced errors.