Indian Wells - Simona Halep took pride in rallying past 19-year-old Caroline Dolehide at Indian Wells, while Petra Kvitova's remarkable win streak skidded to a halt against another US teen.
World No. 1 Halep came from behind to beat Dolehide 1-6, 7-6 (7/3), 6-2 in the third round of the WTA hard-court tournament, while two-time Wimbledon champion Kvitova had her 14-match winning streak snapped as she lost 6-2, 6-4 to 149th-ranked Amanda Anisimova on Sunday.
The 26-year-old Halep is trying to repeat her success in the California desert in 2015 when she lifted the trophy.
"In the end, I think I was stronger in the legs," Halep said. "Also when I had to finish the points, I did. I'm really, really happy about this victory. It was tough down there."
The Romanian improved to 16-1 on the season and said her confidence is what keeps her going in tight matches.
"I didn't give up, which is the most important thing," she said. "I never thought that I would lose the match.
"I just wanted to stay there and to see what is happening. I'm really proud that I could manage this match.
"It was really tough. And for second match of the tournament was amazing match, amazing level, in my opinion."
Halep hit two aces had no double faults, and broke Dolehide's serve five times in the two hour, five minute match.
Halep said she likes use the word "proud" and is trying to maintain a positive attitude.
"I haven't used that word before because I was tougher with myself. So now I'm trying to change that and be kinder with myself," she said. "That's why I just give credit to myself and it gives me confidence for the next days."
Halep booked a round-of 16 clash with China's Wang Qiang, who defeated 14th seed Kristina Mladenovic, of France, 6-1, 6-2.
Despite her top ranked status, Halep is still seeking her first career Grand Slam title. She reached her third Grand Slam final earlier this year at the Australian Open where she lost to Caroline Wozniacki in three sets.
Halep and Wozniacki have taken turns being No 1 this year. Wozniacki took the world number one ranking after winning the Aussie Open but Halep regained it just prior to the Indian wells event.
With her win Sunday over Dolehide, Halep can keep her top ranking unless Wozniacki wins the title.
Elsewhere, Kvitova had been playing some of the best tennis of her career so it wasn't the kind of third round statement the ninth seed was looking for as she lost in straight sets to the youngest player in the draw.
The 14 straight victories tied her previous career best which she set in 2011-2012. The 28-year-old Czech came into Indian Wells having won the last two tournaments she played in.
She missed Indian Wells last year recovering from hand injuries inflicted by a knife-wielding burglar at her home in December 2016.
Kvitova committed four double faults and had her serve broken five times.
The 16-year-old Anisimova, who received a wildcard into the draw, is making her Indian Wells debut.
She said it was the biggest win of her career.
"It feels crazy," she said. "She is the best player I have ever played and it was the biggest court I have ever played on."
In the fourth round she'll face fifth seed Karolina Pliskova, who beat China's Zhang Shuai 7-5, 5-7, 6-3.
Elsewhere, US Open winner Sloane Stephens cruised past wild card Victoria Azarenka in straight sets 6-1, 7-5 in a second round match that was postponed from Saturday night because of rain.
German 10th seed Angelique Kerber and Ekaterina Makarova of Russia stretched their match over two days because of the showers before Kerber prevailed in three sets, 3-6, 6-4, 6-2.
Results on Saturday on the fifth day of the ATP and WTA Indian Wells tournament:
Roger Federer (SUI x1) bt Federico Delbonis (ARG) 6-3, 7-6 (8/6)
Feliciano Lopez (ESP x28) bt Ernesto Escobedo (USA) 6-4, 6-3
Sam Querrey (USA x18) bt Mischa Zverev (GER) 6-4, 7-5
Yuki Bhambri (IND) bt Lucas Pouille (FRA x9) 6-4, 6-4
Dudi Sela (ISR) bt Kyle Edmund (GBR x21) 6-4, 6-4
Milos Raonic (CAN x32) bt Felix Auger-Aliassime (CAN) 6-4, 6-4
David Ferrer (ESP x29) bt Tennys Sandgren (USA) 6-2, 7-6 (7/3)
Leonardo Mayer (ARG) bt Ruben Bemelmans (BEL) 6-4, 6-1
Taro Daniel (JPN) bt Novak Djokovic (SRB x10) 7-6 (7/3), 4-6, 6-1
Gael Monfils (FRA) bt John Isner (USA x15) 6-7 (5/7), 7-6 (7/3), 7-5
Pierre-Hugues Herbert (FRA) bt Gilles Muller (LUX x24) 6-3, 7-5
Philipp Kohlschreiber (GER x31) bt Tim Smyczek (USA) 1-6, 6-4, 6-4
Marin Cilic (CRO x2) bt Marton Fucsovics (HUN) 7-5, 6-3
Simona Halep (ROM x1) bt Caroline Dolehide (USA) 1-6, 7-6 (7/3), 6-2
Wang Qiang (CHN) bt Kristina Mladenovic (FRA x14) 6-1, 6-2
Marketa Vondrousova (CZE) bt Aryna Sabalenka (BLR) 6-2, 6-2
Petra Martic (CRO) bt Jelena Ostapenko (LAT x6) 6-3, 6-3
Maria Sakkari (GRE) bt Coco Vandeweghe (USA x17) 6-2, 6-4
Amanda Anisimova (USA) bt Petra Kvitova (CZE x9) 6-2, 6-4
Karolina Pliskova (CZE x5) bt Zhang Shuai (CHN x32) 7-5, 5-7, 6-3
Angelique Kerber (GER x10) bt Ekaterina Makarova (RUS) 3-6, 6-4, 6-2
Sloane Stephens (USA x13) bt Victoria Azarenka (BLR) 6-1, 7-5