New York, Aug. 30 -- Tenth seed Lorenzo Musetti advanced to the fourth round of the US Open for the first time today after his close friend and compatriot Flavio Cobolli retired due to injury while trailing 6-3, 6-2, 2-0 in their third-round clash.

"Honestly I didn't want to finish like that, especially against Flavio, who is probably my best friend on Tour," Musetti said. "We know each other since we were nine years old, we know each other's families, and we have spent many hours together on and off the court. So, first of all, a big round of applause to Flavio, please."The 23-year-old Italian, who had lost five of his previous six matches before arriving in New York, has looked rejuvenated since dropping his opening set against Frenchman...