World number one Simona Halep overcame a sluggish start to beat Wang Qiang 7-5 6-1 at the BNP Paribas Open on Tuesday and book a quarter-final seed.
She will now rest before joining Petra Martic in the California desert.
The turning point came after a string of unforced errors left Halep trailing 5-4 in the first set.
It prompted coach Darren Cahill to tell the defensive specialist to work longer points and reduce the error count.
Halep went on to lose only one more game, easily seeing off the challenge of the world number 55 from China.
The 26-year-old Romanian showed no sign of the foot injury that forced her to withdraw from the Qatar Total Open in Doha last month.
It does appear now who that is well positioned to make a run at reclaiming the Indian Wells title she won in 2015.
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