Who will replace Simona Halep at the top next week?
Serena suffers dramatic failure on brink of victory.
Coach talks candidly about US legend.
US Open champion looking tough to stop again.
Here is our pictorial from day nine.
Rafael Nadal already looking ahead to semis.
Czech in no mood to party.
A week is a long time in tennis...
Unseeded American marches on.
Stefanos Tsitsipas is into his maiden Grand Slam semi-final.