Andy Murray
Murray through to last eight in Shanghai.Getty

Andy Murray is through to the quarter-finals of the Shanghai Masters after coming from a set down to beat John Isner. After easing past Steve Johnson in straight sets on 13 October, Murray was given a much sterner test by the powerful American but fought back from an early setback to win 6-7 (4-7) 6-4 6-4. The British no. 1 will go onto meet Tomas Berdych or Gilles Simon in the last eight.

Neither man was able to find a break in the evenly-matched contest before but Murray struggled to live with Isner in the tie break, with the 30-year-old American taking the advantage. Murray found an opening in the eighth game of the second set to convert his seventh break point with a powerful backhand however, going on to level the contest with a neat drop shot.

Isner showed resilience of his own in the decider, saving four break points but despite the Briton squandering a chance to seal match point at 5-3, he was able to serve out for the match.

"It's always tough against him – you can feel like you have control when you are into rallies but it's tough to get into them sometimes," Murray told Sky Sports. "Your patience is certainly tested when you play against guys like John."