Naomi Osaka overcame Anett Kontaveit to reach her first Western & Southern Open semi-final, while Maria Sakkari's memorable run came to an end.
Japanese star Osaka rallied past Kontaveit in three sets at the WTA Premier tournament in New York, where the event is being held instead of Cincinnati amid the coronavirus pandemic.
Sakkari, who conquered 23-time grand slam champion Serena Williams in the last 16, bowed out in the quarter-finals on Wednesday.
OSAKA OUTLASTS KONTAVEIT
Two-time grand slam champion Osaka was made to work for her 4-6 6-2 7-5 victory over 12th seed Kontaveit.
After dropping the opening set, fourth seed Osaka regrouped – reeling off nine successive games and hitting 29 winners to earn a semi-final showdown against Elise Mertens.
It is Osaka's second semi-final of the year following her final-four run at the Brisbane International prior to January's Australian Open.
Mertens – the 14th seed – awaits following her routine 6-1 6-3 victory over American qualifier Jessica Pegula.
SAKKARI SENT PACKING
After claiming the scalps of Coco Gauff and former world number one Williams, 13th seed Sakkari suffered a 6-4 6-3 loss to Johanna Konta.
Sakkari was unable to continue her fine run ahead of the US Open as British eighth seed Konta reached her second Premier semi-final thanks to 18 winners, four aces and three breaks of serve.
AZARENKA ROLLS ON
A two-time Australian Open champion, Victoria Azarenka is next up for Konta after the 2013 Cincinnati winner edged Ons Jabeur 7-6 (11-9) 6-2.
Azarenka emerged victorious in one hour, 44 minutes as the resurgent Belarusian moved into the Western & Southern Open semis for the first time in seven years.