Naomi Osaka is the only top-10 remaining at the top of the US Open draw.
Champion two years ago, youngest winner at Flushing Meadows since 2006, the Japanese beat Anett Kontaveit for the second consecutive tournament.
The week before the US Open, in the WTA moved from Cincinnati, the Estonian saw a one-set and one-break disadvantage vanish.
This time there was no story, 63 64 Osaka with whom he never won.
The first Asian player to rise to the top of the rankings is in the quarterfinals of a Grand Slam for the third time in her career.
On the previous two occasions she has gone this far in a major, she has won the title.
Over the past two weeks in Flushing Meadows, Osaka has spent a lot of time in statements and initiatives to raise awareness on issues such as equality, social justice, the claims of the Black Lives Matter movement.
Her announcement of wanting to forfeit before the semifinal, after the boycott in the NBA playoff matches, drew attention to her and to the forfeits in sport for political or ideological reasons.
"Tennis is a global sport and there is always a good opportunity to talk about these issues," said Osaka, who explained how Stefanos Tsitsipas became very interested in the issue after his choice.
In the quarterfinals he will face Shelby Rogers for the fourth time, with whom he has never won even a set so far.
"I don't feel like the favorite, as I've never beaten her, but I'm very optimistic," Osaka said.
Rogers saved four match points to Petra Kvitova, closing 76 (5) 36 76 (6).
The American has thus completed the thirteenth victory over a top 20, the second in the tournament after beating Elena Rybakina in the second round.
They met three times in their careers.
Jennifer Brady also beats Angelique Kerber.
Reaches his first Grand Slam quarter-final.
(HANDLE).
