Sloane Stephens

Sloane Stephens powered past world number three Garbine Muguruza as the seeds continued to fall at the Miami Open on Monday. US Open champion Stephens dominated Spain's reigning Wimbledon champion Muguruza to record a 6-3, 6-4 win and advance to the quarter-finals. Stephens, the world number 12, will face Germany's Angelique Kerber for a place in the semi-finals. Muguruza had been the highest ranked player left in the women's draw following the early exits of world number one Simona Halep and Caroline Wozniacki in the earlier rounds.