1:39newsSeptember 4, 2019Roger Federer loses to unseeded player in US Open quarterfinalsFederer lost in five sets to Grigor Dimitrov while Serena Williams cruised to a 44-minute win in the women’s quarterfinals.Up Next in newsThe US Open moment you have to see September 3, 2019Novak Djokovic defeats Roger Federer at WimbledonJuly 15, 2019The 2024 total eclipse seen across North AmericaApril 8, 2024