Serena Williams' hopes of securing a calendar Grand Slam were ended in stunning fashion by Italy's Roberta Vinci in the semi-finals.
Vinci, the world number 43 and playing her first Grand Slam semi-final, caused a huge upset with a 2-6 6-4 6-4 win.
Williams, 33, had been two wins from completing a clean sweep of all four majors in 2015.
Vinci, 32, will play Flavia Pennetta in an all-Italian final at Flushing Meadows on Saturday.

BBC Sport - Serena Williams loses to Roberta Vinci in US Open semi-finals