Porsche Tennis Grand Prix: Iga Swiatek continues winning run as Sabalenka Gauff suffer shock defeats

World number one and defending champion Iga Swiatek took her Stuttgart winning streak to 10 matches on Friday with a straight sets quarter-final victory over Emma Raducanu while title rivals Aryna Sabalenka and Coco Gauff suffered shock defeats

Top seed Swiatek, the 2022 and 2023 champion at the German clay-court tournament, saw off former US Open champion Raducanu 7-6 (7/2), 6-3

Reigning Wimbledon champion Marketa Vondrousova beat world number two and three-time Stuttgart runner-up Sabalenka 3-6, 6-3, 7-5.

US Open champion Gauff, the world number three, fell 3-6, 6-4, 7-6 (8/6) to Ukraine's Marta Kostyuk.

The 22-year-old Swiatek needed just over two hours to defeat Raducanu who was playing in her first quarter-final since 202212:30

She started playing at the beginning pretty loose, like she had nothing to lose, and I totally get that. Sometimes it is like that," said Swiatek. "But I knew I was kind of questioning if she's going to be able to keep the same intensity throughout the whole match. It wasn't about service games or return games. I was just waiting for my chances to break back and I was sure that I'm going to get them."

Her two wins for Britain in the Billie Jean King Cup win against France last weekend followed by two victories in Stuttgart mark the first time she has won four matches in a row since her 2021 US Open title triumph.

The former world number 10 came into Stuttgart ranked at 303. Twelve months ago, Stuttgart proved to be her final event of 2023 before undergoing surgery on both wrists and her ankle.

The former world number 10 came into Stuttgart ranked at 303. Twelve months ago, Stuttgart proved to be her final event of 2023 before undergoing surgery on both wrists and her ankle.

The sixth-seeded Czech celebrated her first win over Sabalenka in six years after losing four in a row between 2018 and 2023

Well, definitely means a lot, because to be consistent in tennis, it takes a lot of work and a lot of discipline," Kostyuk told "Everything around you has to work really well.