Tokyo Open: Muchova advances to second round

No 8 seed Karolina Muchova moved into the second round of the Tokyo Open when Marketa Vondrousova retired on Monday morning at the Ariake Coliseum.

Muchova, ranked No 12, led 6-2, 1-0 when Vondrousova, ranked No 58, pulled out at the Ariake Coliseum on Monday night.

Karolina Muchova will play Australian Maya Joint next.

Tokyo WTA 500, other first-round results (Ariake Coliseum, hard, USD 1.064.510, most recent results first):

• Moyuka Uchijima vs. Sofia Kenin
• Wakana Sonobe vs. Nikola Bartunkova
• Alina Charaeva vs. Jaqueline Cristian
• Victoria Mboko vs. Bianca Andreescu
• Leylah Fernandez vs. Maria Sakkari
• Diana Shnaider vs. Dayana Yastremska
• Anna Kalinskaya beat Suzan Lamens (LL): 6-3, 6-1
• Maya Joint beat Viktorija Golubic (LL): 1-6, 7-6 (5), 6-2
• McCartney Kessler beat Cristina Bucsa (Q): 3-6, 7-5, 6-3
• Varvara Gracheva (Q) beat Xinyu Wang: 4-6, 6-3, 6-4
• Eva Lys (Q) beat Katie Boulter (Q): 6-2, 6-1