Miami Open: Johanna Konta beats Elise Mertens in third round

British number one Johanna Konta moved into the Miami Open fourth round with a dominant win over Elise Mertens.

Defending champion Konta, ranked 14th in the world, secured a 6-2 6-1 victory over the Belgian world number 21 in 65 minutes.

READ MORE: http://www.bbc.com/sport/tennis/43535322