Maria Sharapova needed two and a half hours to master 18th-ranked Barty 7-5, 3-6, 6-2 in first round match.
Rafael Nadal's straight-set victory means he establishes a new Open era best for consecutive sets won on a single surface.
The former world number one, and twice a winner in the California desert, suffered a stunning defeat on Wednesday to Japanese No. 1 Naomi Osaka, losing in straight sets, 6-4, 6-4.
Sharapova suffered a shock defeat on Wednesday to Japanese No. 1 Naomi Osaka, losing her opening match at the WTA Indian Wells tournament 6-4, 6-4.
Five-time Grand Slam winner Maria Sharapova suffered a shock defeat in the first round of the Qatar Open on Monday, dumped out in three sets by outsider Monica Niculescu.
Roger Federer and Novak Djokovic kept up their relentless march towards a semi-final meeting at the Australian Open Saturday
Maria Sharapova was sent crashing out of the Australian Open in a crushing defeat by Angelique Kerber Saturday as Simona Halep survived a titanic struggle to make the last 16.
Djokovic plays Spain's 21st seed Albert Ramos-Vinolas in the third round.
Milos Raonic was stunned by Lukas Lacko in the first round of the tournament.
Siniakova, the sixth seed, beat the 30-year-old 6-2, 3-6, 6-3 and will face world number one Simona Halep in the final.
Five-time Grand Slam champion Sharapova, making her Shenzhen debut, despatched Romania's world number 56 Mihaela Buzarnescu 6-3, 6-0 in an hour and 20 minutes.
Maria Sharapova is under investigation in India after the collapse of a luxury housing project she had endorsed.
Five-time Grand Slam champion Maria Sharapova is under investigation by Indian police for cheating and criminal conspiracy after the collapse of a luxury housing project that she endorsed, a lawyer said on Tuesday.
Maria Sharapova crashed out in the first round of the Kremlin Cup in Moscow on Tuesday, losing in straight sets to Slovakia's Magdalena Rybarikova.
The former world number one, who returned to action in April, came from behind in both sets and needed four championship points in the tie-breaker before beating the 19-year-old 7-5, 7-6 (10/8).
The 30-year-old Russian, playing on a wildcard in the seventh tournament of her comeback, hit top gear as she swept aside the Chinese third seed in one hour, 18 minutes.
Maria Sharapova was emphatically dumped out of the China Open in the third round on Wednesday by Simona Halep, going down 6-2, 6-2 to Romania's world number two.