Williams finished with nine aces

Her win over the 10th-seeded Erraniof Italy turned out exactly the way it looked beforehand on paper.

Errani spun in serves at an average of 83 mph, while Williams was consistently in the 110s.

Errani hustled from side to side, retrieving balls and trying to get into long points, while Williams stayed patient — but only as patient as she had to be — setting herself up for 38 winners against only 21 unforced errors.

Williams finished with nine aces and heads into the final with 50 for the tournament. Errani's total: Zero.

"My objective was to prolong the match as much as possible," said Errani, who did, in fact, stay out there for 1 hour, 4 minutes.