Miami: Britain’s Andy Murray moved into the third round of the ATP and WTA Miami Open on Saturday but Rafael Nadal, dizzy as he struggled to cope with heat and humidity, retired from his match. World No 2 Murray, twice a Grand Slam champion, downed Uzbekistan’s 76th-ranked Denis Istomin 6-3, 7-5 to reach the third round in a night match.

Andy Murray returns during his match against Denis Istomin at Crandon Park Tennis Center in Florida on Saturday. Pic/AFP