Former US Open champion Bianca Andreescu prevailed over in-form Garbine Muguruza 3-6, 6-3, 6-2 to reach the Miami Open quarter-finals on Mo...

Former US Open champion Bianca Andreescu prevailed over in-form Garbine Muguruza 3-6, 6-3, 6-2 to reach the Miami Open quarter-finals on Monday while reigning US and Australian Open champion Naomi Osaka extended her win streak to 23 matches by defeating Belgian 16th seed Elise Mertens 6-3, 6-3.
Top-ranked defending champion Ashleigh Barty battled into the quarter-finals by outlasting former world No 1 Victoria Azarenka 6-1, 1-6, 6-2 while Ukraine’s fifth-seeded Elina Svitolina rallied to defeat Czech ninth seed Petra Kvitova 2-6, 7-5, 7-5.
Second seed Osaka will next face Greek 23rd seed Maria Sakkari, who outlasted US 29th seed Jessica Pegula 6-4, 2-6, 7-6 (8/6) at the WTA and ATP Masters Series event.
“I started off really well and then for some reason I became a little sluggish. My speed didn’t really feel the same,” Osaka said. “I thought it was really mental from then on. In the end, it was who fought the hardest.”
Four-time Grand Slam champion Osaka broke at love for a 2-0 lead and broke again for a 5-1 edge but Mertens broke Osaka at love in the seventh game and denied four set points for Osaka to hold in an eighth game that lasted almost 10 minutes.
Osaka, seeking her first Miami crown, saved a...