Andy Murray battled back from two sets down to beat France’s Adrian Mannarino

New York: Andy Murray battled back from two sets down to beat France’s Adrian Mannarino at the US Open before calling for new rules to cut the number of retirements, which have hit record levels.

Third seed and 2012 champion Murray triumphed 5-7, 4-6, 6-1, 6-3, 6-1 after his world number 35 opponent had threatened to condemn him to his earliest loss in New York since his debut in 2005.