No. 7 seed Garbiñe Muguruza booked her place in the BNP Paribas Open Round of 16 after surviving a tough 3-6, 7-5 6-2 test against 17-year-old American wildcard Kayla Day.
After breaking to take the second set 7-5, the 23-year-old relied on her experience to get an upper hand in the decider. "I kept calm and kept fighting. There's no secret to my win," said Muguruza.
"[Day] reminds me of me [when I was young]: very motivated and playing very good."
The teenager Day gets to leave the Coachella Valley with her head held high, and knowing that she's been able to perform well in her home tournament. Hailing from Santa Barbara, Calif., she now resides in Long Beach while training in the USTA facility in Carson.
"I was so grateful for the wildcard to be able to do so well, such a big tournament," said Day. "It really means a lot to me. I think it was a confidence-booster for me this week."
Up next for Muguruza is tenth seed Elina Svitolina, a 6-2, 6-1 winner over Daria Gavrilova. The Ukrainian has won 15 of her last 16 matches, which includes winning the Taipei City title and an upset of World No. 2 Angelique Kerber en route to the Dubai crown.