Frances Tiafoe directed an expletive-filled tirade at a chair umpire after losing his third-round match Tuesday at the ATP Shanghai Masters event. Tiafoe lost to unseeded Roman Safiullin 5-7, 7-5, 7-6 (5), minutes after chair umpire Jimmy Pinoargote called a time violation on the 13th-seeded American's service. After congratulating Safiullin at the net, Tiafoe pointed at Pinoargote and shouted, "F--- you, man! F--- you! Seriously, man. F--- you! You f---ed me out of the f---ing match!" Tiafoe added he had been battling on court for three hours for his livelihood, peppering his words with more expletives. Tiafoe initially protested with the final-set tiebreak tied at 5-5, when Pinoargote called him for the time violation, which cost Tiafoe his serve. Tiafoe had tossed the ball in the air, though it was unclear if it was an attempt to serve. "No, no, I tossed the ball up. ... I was ready to serve," Tiafoe said to Pinoargote. "Dude, that's the rule." "I'm not buying it,...