Stuttgart Open: Andreeva moves into second round as sister Erika retires

No 6 seed Mirra Andreeva moved into the second round of the Stuttgart Open when lucky loser Erika Andreeva retired at the Porsche-Arena.

Andreeva, ranked No 7, led 6-2, 1-0 when Andreeva, ranked No 97, pulled out on Wednesday at the Porsche-Arena.

Mirra Andreeva will play Ekaterina Alexandrova next.

Stuttgart WTA 500, other first-round results (Porsche-Arena, clay, EUR 925.661, most recent results first):

• Tatjana Maria vs. Ella Seidel
• Magdalena Frech vs. Sara Errani
• Emma Navarro (7) beat Beatriz Haddad Maia: 6-3, 6-0
• Jasmine Paolini (5) beat Eva Lys (WC): 6-2, 6-1
• Jule Niemeier (WC) beat Laura Siegemund (WC): 4-6, 6-3, 6-4
• Ekaterina Alexandrova beat Liudmila Samsonova: 6-3, 6-3
• Jana Fett (Q) beat Donna Vekic: 7-6 (2), 6-4
• Jelena Ostapenko beat Dayana Yastremska (Q): 6-3, 3-0 ret.
• Diana Shnaider (8) beat Veronika Kudermetova (Q): 5-7, 6-2, 6-3
• Anastasia Potapova beat Clara Tauson: 2-6, 7-6 (8), 6-3
• Elise Mertens beat Aliaksandra Sasnovich (Q): 7-6 (3), 6-2