From tennis.matchstat.com, I got the stat for one match I was searching for for quite some time :
federer ancic wimbledon 2006 QF:
federer : 35 winners, 17 UEs, 92 points won
ancic : 24 winners, 13 UEs, 75 points won
federer's AM ~ 37.1%
ancic's AM ~ 27%
This was a brilliant, highly under-rated match ... the scoreline of 6-4,6-4,6-4 does no justice to how well Ancic played . Federer was just too good and had all the answers ...