Since that Saturday, Williams won the 2017 Australian Open, became the winningest player of the Open era, regained the No. 1 world ranking, had a baby, got married and didn't play a tournament for 14 months.
After a barren six-year spell marred by Wimbledon final defeats against Venus and Maria Sharapova, it was Serena's time to regain her throne. I think that's what I was doing in the past, I was limiting myself.
She opened with a double fault and won the next point with a bludgeoning forehand of breathtaking audacity, a pattern that left the audience gasping at her free-flowing brilliance and then gasping again at her appalling blunders right through the game. "She does it so well".
They've played each other a total of eight times in the past, and Williams leads 6-2. Rumors have been circling for weeks that the new Duchess of Sussex would attend Wimbledon to cheer on her good friend, tennis legend Serena Williams. "She's such a great opponent". I don't think Serena is the greatest mover on the court, and that is how Camila Giorgi took her to the limit.
This was one of a clutch of strangely lacklustre all-Williams finals that played a role in the public's apathy. If she manages to beat Angelique Kerber for her 24th Grand Slam singles victory, it is hard to imagine what she could do for her next act.
She was off the tour for more than a year after her Australian Open title in January 2017 - won while she was pregnant, she later revealed. But it will be no easy road.
In the first set, the experienced Kerber broke twice while the only break point Ostapenko earned was when she was leading 3-2.
But when the steely-eyed Williams imposed her iron will, the challenger was unable to reply, dropping five games straight to surrender the first set and fall behind in the second.
If Kerber can put in a high percentage of first serves and extend the rallies, as she did often against Williams in 2016, she certainly has a counterpuncher's chance. She's also pounded 44 aces, seen 50 percent of her first serves unreturned and hammered a 122 miles per hour ace against Camila Giorgi in the quarters. Equally important will be the mental game that goes on between these two women.
"I lost count after, like, four surgeries", said Williams, who has been wearing compression leggings this fortnight as a precaution. Along the way she has seen off the entire careers of world-class players. For a whole week before the Championship began, she posted throwback photos and motivational quotes around her many wins here. "That's why she is where she is now".