Wimbledon 2019: Caroline Wozniacki beaten by Zhang Shuai in third round

Caroline Wozniacki complains to the umpire about a line call that irked her

Former world number one Caroline Wozniacki is out of Wimbledon at the third-round stage following a 6-4 6-2 defeat by China's Zhang Shuai.

The Danish 14th seed was 4-0 up before Zhang, who has not got past the first round previously, fought back.

Wozniacki seemed to let some line calls affect her as the world number 50 triumphed in one hour and 20 minutes.

Zhang will now play Ukraine's Dayana Yastremska after the 19-year-old beat Viktorija Golubic 7-5 6-3.

"Maybe the Hawk-Eye was right. Maybe I just saw it wrong. I don't know," said Wozniacki.

"But you trust Hawk-Eye normally. You trust that it tells you the right thing. I do believe that it was not in the ideal place today."

• Gauff, 15, makes astonishing comeback

• Djokovic survives scare, Anderson goes out

• Fourth seed Anderson beaten by Pella

Halep gets better of Azarenka

Romanian seventh seed Simona Halep got the better of another former Grand Slam winner in Victoria Azarenka as she beat the Belarusian, ranked 40th in the world, 6-3 6-1 in one hour and six minutes.

Halep will now face 15-year-old star Coco Gauff after the American fought back in incredible fashion to beat Polona Hercog.

Azarenka, meanwhile, was handed a code violation for slamming her racquet into the Centre Court turf.

"I think it was pathetic, to be honest," she said. "I understand the no tolerance, whatever it was, two metres outside of the court. I didn't damage the court or anything like that.

"It's like you have to be with no single emotion on the court, and that's just not tennis. I'm sorry, but it's not."

Third seed Karolina Pliskova, who won at Eastbourne last month, battled past Taiwan's Su-Wei Hsieh 6-3 2-6 6-4. The big-serving and hard-hitting Czech player was in control of the match before Hsieh hit back, producing a handful of superb drop-shots en route to taking the second set.

Pliskova broke the 28th seed in the third game of the decider as she went on to secure victory and a fourth-round match against compatriot Karolina Muchova, who beat Estonia's 20th seed Anett Kontaveit 7-6 (9-7) 6-3.

Earlier on court three, eighth seed Elina Svitolina saw off Greek 31st seed Maria Sakkari 6-3 6-7 (1-7) 6-2 with her seventh match point in an error-strewn match.

The Ukrainian had two chances to get over the line at 6-5 in the second set before going on to lose the tie-break.

Svitolina wasted three more opportunities at 40-0 and two at deuce in the eighth game of the deciding set before she eventually booked her spot in the fourth round courtesy of Sakkari's 48th unforced error.

In the next round, Svitolina will face either American Danielle Collins or 21st seed Petra Martic of Croatia.

• Live scores, schedule and results

• Alerts: Get tennis news sent to your phone