No. 2-ranked Simona Halep has displayed her mental toughness in her exciting U.S. Open run thus far.

After being knocked out in the first round by unseeded Jana Cepelova at Wimbledon, Halep has bounced back nicely at the Open.

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She will take on No. 20-ranked Victoria Azarenka this afternoon, marking the first time she has reached the quarterfinals at the tournament in her career. Halep is coming off a win over Sabine Lisicki.

"It was a good thing that I could win matches before coming here," Halep told reporters. "Mentally, I was a little bit down after Wimbledon. Now I found the way back."