A casual observer would never have known that it was the 25-year-old American's first major quarterfinal.
"I'm destroyed", Carreño Busta said after the four-plus-hour match, "but I'm very, very happy". There was no yelling, excessive celebration or tears of joy.
"I came out with nerves, obviously, and I think she did too because it's our first quarter-final, but I just tried to treat it like any other match. Yeah, just not the best day for me, but she played really good". ESPN analyst Cliff Drysdale predicted that it will be a "slugfest for the ages". She played a great match.
Brady, now ranked No. 41, is undoubtedly the underdog heading into the match. Not only is she not seeded at Flushing Meadows, she doesn't even appear in the WTA rankings at all - this was her first tournament of any sort in more than three years, because she left the tour to become a mother.
Osaka has been honouring black victims who have died by the hands of police before and after every match at the 2020 US Open by wearing a personalised facemask in a stand against racial injustice.
"None of these deaths had to happen", Osaka said at the time. "So that's going to have to be No. 1". She's going to have to be physically 100 percent. So really be thoughtful. I think she'll need to be resilient during Osaka's streaks and hang in there as best she can and figure out how to turn it around.
It has been an unorthodox journey for Brady.
The 23rd seeded Putintseva, a feisty player known for her variety and demonstrative personality, didn't back down in the set. It seems clear that her decisions are now paying off. I was doing all kinds of shots, and everything went.my way, " Pironkova said. "I know she's a big threat". "Right now she's playing in her little bubble, she's only in her head, and that's producing her best tennis".
The fourth-seeded Osaka cruised past Shelby Rogers 6-3, 6-4, serving six aces and losing just four points on her serve.
"It just shows me how tough moms are, " Williams said afterward.
Although fans might be surprised by Brady's recent success, it's clear that her peers aren't.
Naomi Osaka and Jennifer Brady powered into the US Open semifinals on Tuesday. "I was just trying to do everything I can - whether righty or lefty". "Naomi is an fantastic player, so there is no doubt the match will be tough for both players, but it will be great to watch".
Taking the road less travelled has handsomely paid off for Jennifer Brady, who finds herself in the US Open semi-finals without having dropped a set. She had a lot of topspin; she moved so well; she had a lot of power; she had a kick serve when she was 12. We will have to wait and see.
"She's been at this a long time and is now seeing all the sacrifices and hard work pay off", Shriver said.