Andy Murray rose above a day of chaos at the Shanghai Masters on Wednesday as Rafael Nadal fell at the first hurdle and Nick Kyrgios melted down in spectacular fashion.

Murray, seeking to wrest the world No 1 ranking from Novak Djokovic by the year's end, breezed past Steve Johnson 6-3, 6-2 to reach the third round.

It was a very different story for Nadal, who departed grim-faced and with his ardent fans in tears after a stunning 6-3, 7-6 (7/3) loss to Viktor Troicki.