Stuttgart Open: Kostyuk advances to second round

Ukrainian Marta Kostyuk moved into the second round of the Stuttgart Open by edging out German wildcard Laura Siegemund 6-3, 6-7 (4), 6-4 at the Porsche-Arena on Wednesday.

Kostyuk, ranked No 27, will play Chinese Qinwen Zheng, the No 5 seed, next.

Stuttgart WTA 500, other first-round results (Porsche-Arena, clay, USD 802.237, most recent results first):

• Emma Raducanu vs. Angelique Kerber
• Anastasia Potapova beat Liudmila Samsonova: 6-4, 4-6, 6-3
• Ons Jabeur (7) beat Ekaterina Alexandrova: 2-6, 6-3, 7-6 (1)
• Linda Noskova beat Jelena Ostapenko (8): 6-3, 6-1
• Elise Mertens beat Tatjana Maria (WC): 6-1, 4-6, 6-0
• Marketa Vondrousova (6) beat Donna Vekic: 6-4, 6-3
• Qinwen Zheng beat Sorana Cirstea: 6-2, 6-3
• Jasmine Paolini beat Sara Errani (Q): 6-1, 6-0
• Veronika Kudermetova beat Barbora Krejcikova: 5-7, 6-4, 6-4
• Paula Badosa beat Diana Shnaider (Q): 6-3, 6-4
• Sachia Vickery (Q) beat Aliaksandra Sasnovich (Q): 7-6 (2), 7-5