Italy’s Errani and best friend Roberta Vinci beat Nuria Llagostera Vives and Maria Jose Martinez Sanchez of Spain 6-3, 6-2 to make Sunday’s women’s doubles final.
Errani, a 10th seed in singles, will also play Serena Williams in Friday’s singles semis, having beaten Vinci 6-2, 6-4 on Wednesday in the quarters. Not since Williams in 1999 has a woman won US Open singles and doubles crowns.
Williams beating Martina Hingis in the singles final and paired with sister Venus to capture the doubles. Other women who have done the US Open singles-doubles twin wins in the Open era are Martina Navratilova, Arantxa Sanchez-Vicario, Billie Jean King and Margaret Court.