New York: Defending champion Andy Murray struggled with his serve and spent plenty of time scampering after shots, but responded to the challenge by raising his game Friday to reach the third round of the US Open.
British third seed Murray, the reigning Wimbledon and Olympic champion, advanced with a 7-5, 6-1, 3-6, 6-1 victory over Argentina's 81st-ranked Leonardo Mayer in a match of rivals who were both born on May 15, 1987.
"Very tough match," Murray said. "Both of us ran a lot and it was very humid. I'm just glad I was able to put it together and pull it out in the fourth set."