Miami: Alexander Zverev capitalised on a fast start against Australian Nick Kyrgios to grind out a 6-4, 6-4 victory in a battle between two of the sport's brightest prospects to advance to the quarter-finals of the Miami Open on Tuesday. Earlier, big-serving American John Isner overcame second-seeded Croatian Marin Cilic 7-6 (7-0), 6-3 to advance to the quarter finals, where he will face South Korean Chung Hyeon, who dominated Joao Sousa in a routine 6-4 6-3 win. Del Potro beat Raonic in last week's semi-finals in California before edging out Federer in the title match. 1 Angelique Kerber 6-1, 6-2 and reach the Miami Open semi-finals for her first time. The win guarantees that 25-year-old Florida native Stephens will make her debut in the top 10 when the WTA rankings are released after the tournament.

Source: The Telegraph March 28, 2018 21:22 UTC