Irina-Camelia Begu

Kayla Day, 17, copes with Paribas Open loss like a pro

Kayla Day, 17, copes with Paribas Open loss like a pro

At 17, Kayla Day is mature enough to realize she had to look past her immediate disappointment and consider the larger context of her second-round loss to world No. 7 Garbine Muguruza of Spain on Sunday at the BNP Paribas Open.

Day won the first set and had two break points at 5-5 in the second, but couldn’t put away the increasingly steady Muguruza, the 2016 French Open champion. Muguruza won the match, 3-6, 7-5, 6-2, at Stadium 1 but Day gained experience and a sense of the consistency and craft she will need in order to flourish against opponents who are older and more accustomed to handling pressure on a big stage.

“I was pretty upset after my match because it didn’t go...

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