Second-seeded Garbiñe Muguruza improved to 2-0 in group-stage matches at the WTA Finals by beating Angelique Kerber, 6-4, 6-4, in Singapore. Fourth-seeded Petra Kvitova beat Lucie Safarova, 7-5, 7-5. Safarova fell to 0-2, and Kvitova and Kerber are 1-1.
Sports Briefing | Tennis: Muguruza Defeats Kerber
