With Williams and Osaka ranking first and fourth in aces this fortnight, respectively, big serving will be on display in the women's final, and breaks will be at a premium.
As in her semi-final win over Karolina Pliskova, Williams took a while to warm up, dropping her serve in the opening game.
Adding consistency to her well-established power game, she has looked the part of a young Serena in dropping just a single set on her way to her first Grand Slam final.
This neatly moves me on to the current US Open - yes, the draw has opened up for Williams and she hasn't played almost as high an opponent quality as would be usual for a non-top seed (I still wonder how she'd have fared against Simona Halep in a relatively early round) but Williams' data has been extremely impressive. "I'm for sure going to watch it".
The American pulled out a few old tricks of her own to catch Sevastova off guard.
At important points during that match, Osaka said she asked herself, "What would Serena do?" The bright lights of Ashe didn't seem to faze her against Madison Keys, and she'll need to approach Saturday like it's any other match.
Naomi Osaka is the youngest US Open women's finalist since 19-year-old Caroline Wozniacki in 2009. She will be tested, no doubt, but with the crowd behind her, with everything she's been through in the past year, with Margaret Court's Grand Slam record dangling within reach once again, Serena will not falter.
She will turn 37 on September 26, unsure when she'll fully get back to the player she was before her health scares.
A Grand Slam title is obviously the big prize of the U.S. Open, but for Naomi Osaka, the chance to simply face Serena Williams is a prize in itself. "I got a little emotional out there because a year ago I was literally fighting for my life in the hospital", she told the Times. "Every day I step on this court, I am grateful that I have an opportunity to play this sport. She makes so much pressure on the first, second ball, it's tough for me", Sevastova said. She helps us all to believe that beauty is defined by your soul, your fire and your scars.
Serena Williams was a bit shaky at the start of her US Open semifinal.
Potentially standing in the way of Barty's maiden grand slam title is fellow Queenslander and two-time women's grand slam doubles champion, Sam Stosur.
China Pledges Fresh $60 bln to Africa, says No Political Strings Attached
Chinese companies were also encouraged to make at least US$10 billion in investment in Africa in the next three years, Xi said. He adds that this was not the only reason why the trip has been a success and why Ramaphosa is in China.