"I don't know I just walk around and everyone is just like normal".
The second set started badly for Osaka when she conceded an early break and then continued to struggle as Hsieh zipped around the court making stunning returns. This helped her pull herself together to reach the last eight, too.
Osaka closed out the showdown with a blinding forehand down the line, her 51st victor of the match.
Svitolina needed to dig deep to overcome 17th seeded Keys, a US Open finalist in 2017. I finished in three good sets today. I am going to enjoy this first because I have to keep positive for the next round.
Osaka said she'd have to regroup quickly for her fourth-round match against No. 13 Anastasija Sevastova, who she beat in three sets in the Brisbane International quarterfinals in the first week of the season.
The clash, which Konta condemned as unsafe and unhealthy, began at 12:30 am and finished after a draining three sets at 3:12 am, the latest end to a women's match at the Grand Slam. It was all one-way from then on. "I had to rise and put my level up and was very happy I could handle the pressure (serving at) one all in the third set".
"I was very happy I could win that game".
"I was watching all these kids winning".
Hsieh was troubling Osaka with her groundstrokes
Having beaten Serena Williams in straight sets during the U.S. Open final, there was nothing particularly shocking about Osaka reaching the quarter-finals in Melbourne where she will meet sixth seed Elina Svitolina.
It ended a comeback by Keys, who didn't quite find her range with her ground strokes and 34 unforced errors, including some very nears misses on big points.
Another win now and there's potential for Osaka to have a rematch of the U.S. Open final against Serena Williams.
Right from the start, Yastremska appeared a bit jittery, missing 9 of 10 first serves and double-faulting three times while getting broken in each of her opening two service games.
Firing baseline rockets wide and long, Osaka appeared clueless as to how to stop the rot and resorted to drop shots and moon balls to try to throw Hsieh off her game.
After surviving Hsieh Su-wei in the previous round, Osaka found herself up against another tricky customer in Latvian Sevastova, who made the semi-finals in NY.
That she does. She also makes abundantly clear just how much every point means to her.