Porsche Grand Prix: Haddad Maia into last 16 after Trevisan retirement

Brazilian Beatriz Haddad Maia reached the last 16 of the Porsche Grand Prix when Italian Martina Trevisan retired at the Porsche-Arena in Stuttgart on Tuesday.

Haddad Maia, ranked No 14, led 7-5, 1-1 when Trevisan, ranked No 20, pulled out at the Porsche-Arena in Stuttgart on Tuesday.

The Brazilian will play the winner of the match between German wildcard Jule Niemeier and Kazakh Elena Rybakina, the No 6 seed, next.

Stuttgart WTA 500, other 32 results (Porsche-Arena, EUR 780.637, most recent results first):

• Coco Gauff vs. Veronika Kudermetova
• Jule Niemeier vs. Elena Rybakina
• Karolina Pliskova vs. Maria Sakkari
• Barbora Krejcikova vs. Liudmila Samsonova
• Jelena Ostapenko vs. Emma Raducanu
• Tatjana Maria vs. Ylena In-Albon
• Petra Martic vs. Anastasia Potapova
• Daria Kasatkina vs. Paula Badosa
• Donna Vekic beat Ekaterina Alexandrova: 7-6 (7), 7-6 (5)
• Cristina Bucsa (Q) beat Tamara Korpatsch (Q): 3-6, 6-4, 6-0
• Qinwen Zheng beat Alycia Parks (LL): 6-4, 6-4