By my count (again doing a little guesswork on those 6 points where only one side of the court is shown):
Borg made 19 unforced errors: 10 FH, 4 BH, 2 FHV, 1 BHV, 1 OV, 1 DF
Vilas made 51 unforced errors: 9 FH, 31 BH, 4 FHV, 1 BHV, 1 OV, 5 DF
Borg made 10 forced errors: 2 FH, 4 BH, 1 FHV, 3 BHV
Vilas made 12 forced errors: 4 FH, 5 BH, 3 FHV
Borg worked over Vilas’ backhand and really broke it down. His tactic seemed often to pull Vilas wide with crosscourt backhands and then drive a forehand into Vilas’ backhand corner. That forced Vilas into some errors, but he coughed up plenty of unforced errors under the pressure as well.
31 UE and only 3 clean winners from the Vilas BH.