Qatar Open: Kasatkina rounds out sweet 16 in Doha

Russian Daria Kasatkina, the No 6 seed, beat Canadian qualifier Rebecca Marino 7-6 (5), 6-2 to move into the second round of the Qatar Open at the Khalifa International Tennis and Squash Complex in Doha on Tuesday evening.

Kasatkina, ranked No 8, will play Brazilian Beatriz Haddad Maia next.

Doha WTA 500, other first-round results (Khalifa International Tennis and Squash Complex, hard, USD 780.637, most recent results first):

• Ekaterina Alexandrova beat Karolina Pliskova (Q): 6-1, 6-2
• Maria Sakkari (5) beat Qinwen Zheng: 6-2, 3-6, 6-3
• Beatriz Haddad Maia beat Paula Badosa: 7-6 (6), 6-3
• Belinda Bencic (7) beat Viktoriya Tomova (Q): 6-0, 6-1
• Sofia Kenin (WC) beat Liudmila Samsonova: 6-3, 6-1
• Jelena Ostapenko beat Madison Keys: 7-5, 6-2
• Petra Kvitova beat Shuai Zhang: 7-5, 6-2
• Danielle Collins beat Elise Mertens (Q): 6-4, 7-6 (6)
• Victoria Azarenka (WC) beat Ipek Oz (WC): 6-1, 6-1
• Veronika Kudermetova (8) beat Barbora Krejcikova: 6-4, 3-6, 7-6 (5)
• Karolina Muchova beat Martina Trevisan: 6-2, 6-2