On Monday, John Millman pulled off the biggest upset of the tournament, and his career, by defeating Roger Federer in the round of 16 at the US Open. In four sets, 3-6, 7-5, 7-6, 7-6, the Australian took advantage of a less-than-100 percent Federer to nab the win.
Social media immediately blew up, stunned by the loss that should have been a quick stop on the way to the quarterfinals for the Swiss Maestro.