Wikipedia - Bjorn Fratangelo

Bjorn Fratangelo ( bee-ORN frə-TAN-jə-loh; born July 19, 1993) is an American professional tennis player.

He won the boys' singles title at the 2011 French Open defeating Dominic Thiem. Fratangelo is only the second American out of three to win the event, following John McEnroe in 1977 and preceding Tommy Paul in 2015.