Andy Murray
Murray successful in round two in China.Getty Images

Andy Murray has sealed his place in the third round of the Shanghai Masters with a straight-sets victory over Steve Johnson.

Competing for the first time since leading Great Britain to Davis Cup semi-final success against Australia, the British number one coolly dispatched his American opponent with a comfortable 6-2 6-4 win. The 29-year-old will take on 13th-ranked John Isner in the next round after the American's victory over David Goffin. Murray dropped serve in his opening game but was comfortable throughout the remainder of the contest, breaking back immediately before winning four games in a row.

Johnson provided a slightly sterner test in the second set, maintaining pace with Murray until he was broken again at 5-4. Murray made no mistake in finishing the 30-year-old off, though, sealing the win in one hour and 16 minutes.

Isner will provide a tougher test for the world number two, but Murray boasts a vastly superior record in their previous encounters, having won all four of their past battles.