Novak Djokovic breaks down, cries into his towel mid-match during US Open final

World number one Novak Djokovic broke down and cried into his towel before Medvedev was set to serve for the match in the third set of the US Open men's singles final. The 34-year-old covered his face with a towel as the crowd cheered him up. "We've never seen anything like this from Djokovic," the commentator said.