Errors (forced and unforced)
Subtracting the winners and aces from the total points won, to get the total forced and unforced errors:
Sampras made 58 total errors. Of those, I counted 31 return errors and 5 double-faults.
Agassi made 60 errors. Of those, I counted 27 return errors and 6 double-faults.
Usually Agassi makes fewer total errors than Sampras, though he did make fewer return errors.
In all exchanges that had at least a successful return of serve, Sampras made 22 errors, Agassi 27.
Early on McEnroe noted how unexpectedly well Sampras was hitting his ground strokes in the rallies.