For the fun it, i re-watched first set and decided to score the stats, always curious to see if my definition of a winner, UFE, FE etc... was the same as what the statisticians keep track off. I came close but a few observations.
Somehow i scored Novak with 45 pts and Federer with 42 pts when it was actually 46/41 officially. Aside from this, i was close on winners/UFEs but not exact.
Winners - includes service winners (no aces), volley put aways, overheads, shots that opponent can't reach or barely gets racquet on it
UFEs - player has a fairly easy shot, misses
FE - Player is under pressure, out of position, 'forced' to hit a difficult shot. Also scored difficult serves to return as forced errors, serves that weren't quite unreturnable but very difficult to get back.
I scored it as follows:
Winners/UFEs - Fed 21/16, Novak 10/9
Forced errors - Fed 11, Novak 5
Aces - Fed 5, Novak 4
Service winners - Fed 4, Novak 3
double faults - Fed 2, Novak 1
When combining total winning shots (winners + aces) vs total errors (UFEs + FEs) - Fed 26/28, Novak 17/16
All of sudden stats look a bit different. Federer is definitely the one dictating but making more errors than winners. I think that the the fact that the 'forced' error isn't recorded as a stat, is a shame, it's an underrated stat.
So when comparing 26/28 vs 17/16 winning shots/total errors, it looks quite different than 21/16 vs 10/9 winners/UFEs.
Lastly, the forced error is, in part, a result of quality shots from the opponent. All those forced errors i recorded (Fed 11, Novak 5) were a result of a player making an error because the opponent was dictating play, hitting quality shots which 'forced' errors. The person 'forcing' the error is hitting shots that don't quite get scored as winners but close to being winners, shame they don't get credit for those shots.