Serena and venus williams
Keys and Stephens to put friendship to grand slam test
It will mark the first time two American women have played for the US trophy since 2002 when Venus and Serena Williams met.
She will meet either CoCo Vandeweghe or Madison Keys, who face each other later on Thursday, in an all American final.
It was the second year running that Williams, seeded 10th and competing in her 20th French Open, lost to the Swiss in the Roland Garros fourth round .
Serena’s sister Venus Williams appeared to let slip they are expecting a baby girl during an interview on Wednesday when she joked about wanting the baby to be named after her.
Former American champion Tracy Austin says older players are stronger and keener than their younger counterparts
Serena Williams beat her sister Venus 6-4 6-4 in the Australian Open final on Saturday to win her 23rd grand slam singles title.
Venus and Serena Williams meet for the ninth time in a Grand Slam final at the 2017 Australian Open on 28 January.
A semi-finalist at Wimbledon last year, Williams last reached the last four in Melbourne in 2003.
The sisters fell 6-3 6-4 to Czech pair Barbora Strycova and Lucie Safarova.
Serena Williams took charge of the opening set by securing service breaks in the fifth and seventh games.
World number 1 Novak Djokovic beat Bautista Agut 6-4, 4-6, 6-4, 6-3 to move on to the quarterfinals.
The US Open champs kicked off their China Open campaigns with straight sets victories.
Venus Williams upset little sister Serena 6-7(2) 6-2 6-3 to register the first win over Serena in five years.
The Williams sisters are out of the French Open after suffering second-round defeats.
Organisers were forced to abandon the opening day's play due to bad weather conditions.
The usual suspects have been lined up for a run at the US Open crown.
Rafael Nadal humiliated Roger Federer to win the Italian Open on Sunday.