Nagal, who had qualified for the main draw last week, stunned the tennis legend by winning two consecutive games at 4-4 to close the first set in his favour in the men's singles first-round match in New York.

from Times of India https://timesofindia.indiatimes.com/sports/tennis/us-open-2019/sumit-nagal-wins-first-set-against-roger-federer-at-us-open/articleshow/70851580.cms