NEW YORK — On high alert after a day of upsets during which Serena Williams was sent packing from the U.S. Open, Novak Djokovic and Roger Federer made sure their names were not added to the list of shocks on Friday as they posted emphatic semi-final victories.
The tremors started early at Arthur Ashe Stadium with Flavia Pennetta crushing second seed Simona Halep 6-1 6-3, before Roberta Vinci rocked Flushing Meadows delivering one of the biggest upsets in tennis history with her semi-final win over Williams that punctured the American's calendar Grand Slam
dream.
Two victories from becoming the fourth woman to win all four majors in one year, a brittle-looking Williams crumbled as unseeded Vinci, playing in her first grand slam singles semi-final, battled to an improbable 2-6 6-4 6-4 win.