Andy Murray gave an unconvincing account of his US Open title credentials as he struggled to victory over Feliciano Lopez in round three. Murray (7/2 to win the US Open) edged the first two sets and was twice a break up in the third, only to gift Lopez a route back just as the Spaniard looked a beaten man. He laboured through 7-6 (7-5) 7-6 (7-5) 4-6 7-6 (7-4) in three hours 53 minutes on a baking Louis Armstrong Stadium.
The British number one will face 15th seed Milos Raonic (5/2 to win the match) in the last 16. He is aiming to win a maiden Grand Slam title, but is likely to need a significant improvement for that to happen.
Murray, seeded third for the US Open, said "I was struggling a bit physically and that made it challenging. I was up two sets and a break and should have done better there, but I played well in the tie-breaks and that was the difference. He played some really good stuff and served well when he was down. He was able to dictate a lot, win free points and play well at the net."
The Olympic Champion (7/2 to win the US Open) added "It's the last major event of the year and you want to push through anything physically. I will be out here in the next match giving 100%."