"I felt great. I felt like I was just giving all I had in me there, and that's what I work for, you know, the moments that really matter".
When it comes to his semifinal opponent, Wawrinka will have to try and hang tough against the 21st-seeded Carreno Busta. Pacing methodically between points, Kuznetsova cranked her ninth ace down the T holding for 3-2 after two hours, 35 minutes of play. "That's changed, for sure", Sock said. "I will try my best to be closer to 100 percent in the next tournament".
Vesnina, seeded No. 14 here, had trailed No. 8-seeded Kuznetsova, 1-4, in the second set before she won four straight games. Vesnina defeated Rogers, 6-4, 7-5, and in the third round, the reigning Olympic Gold doubles medalist had a three-set tussle with Timea Babos.
In a major setback, seven-time Grand Slam champion Venus Williams suffered a crushing defeat against World No. 15 Elena Vesnina to bow out of the Indian Wells Masters under the lights of Stadium 1 on Thursday evening.
Vesnina is into her first career WTA Premier semifinal.
"She's on fire. So am I", said Vesnina.
The 23-year-old Frenchwoman improved to 16-5 on the season, a run which includes her first career title in St. Petersburg, and an appearance in the final earlier this month in Acapulco.
"I see that it's paying off, that the results are coming", Mladenovic said.
He overcame four match points against 12th-seeded Grigor Dimitrov in the third round and was two points from losing against Malek Jaziri in the third set before he pulled out a 4-6, 7-6 (1), 7-5 fourth-round victory.
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The two-time Grand Slam champion has played scintillating tennis this week in the Californian Desert. "Definitely my serve helped me". He is the top-ranked US men's player.
What a difference a year makes. "So I need to be aggressive and I need to dominate the points because he's really risky with his forehand".
And while Mladenovic was an easier draw than Williams was the night before, the confidence Vesnina flashed in the spotlight suggests she could push Kuznetsova to three sets with a trophy on the line.
Neither Mladenovic nor Wozniacki had dropped a set before their quarterfinal. In the third-set tie-break, I served really well. Little, lazy mistakes for me.
Vesnina had 46 winners and 49 unforced errors.
"Kiki was always trying to play her best tennis when she was behind on the score", Vesnina said.
According to ATPWorldTour.com, Federer has won both career matches against Sock-each of which came in 2015.
The Russian lost in the first round of qualifying past year but in the latter of half 2016 she reached her first Grand Slam semifinal at Wimbledon and finished ranked inside the top 20 for the first time in her career. After the match Williams acknowledged some physical "issues" that had troubled her throughout the tournament, although she declined to elaborate.