Britain's Cameron Norrie says he might have paid the price for being a "little overconfident" as 24-time Grand Slam champion Novak Djokovic battled through injury to reach the fourth round.
Norrie has now lost all seven of his meetings with the 38-year-old Serb following a 6-4 6-7 (4-7) 6-2 6-3 defeat in New York.
The 30-year-old left-hander briefly moved ahead in the match when he broke at the start of the third set.
But Djokovic fought back to end British singles interest at the final major tournament of the season.
"I started great in the third set but [was] maybe a little overconfident after breaking," Norrie told BBC Sport.