UNC Tennis: Tar Heel alum William Blumberg wins ATP Doubles title Posted Jul 25, 2021 Former Tar Heel tennis player William Blumberg had an illustrious and decorate career at North Carolina. He was the first person to ever become a 10-time All-American, getting the honor in both singles and doubles all five seasons that he competed at Carolina. That career came to an end earlier this year, and he has since entered the professional ranks. (Tar Heel Blog)