"I feel like just getting through it in general was all I'm looking at now and not looking back and just moving towards the next match", offered a relieved Williams.
Stephens gave credit to her opponent, Sevastova saying "It's hard match and I though she played solid today and obviously the better player won".
"When the shade was there it was so hot here and unbelievable there", Sevastova said of the contrast of playing on the shady or sunny end of the court.
"I hope that I can go to Asia and win some more matches and hopefully make the year end and hopefully keep going as far as I can".
Sevastova, who stepped away from the game for two years in 2013 after a variety of injuries, will face either 23-time major champion Serena Williams or Karolina Pliskova for a place in the final.
The victory match went to Anastasija Sevastova 6-2, 6-3 and it was the press conference afterwards that Stephens told her own tale of woe saying "I didn't convert and play the big points well and you don't win matches when you don't take the opportunities.Mentally, physically I just wasn't connecting".
Sharapova's US Open night-mare
Maria Sharapova , of Russian Federation , waits for Jelena Ostapenko , of Latvia, to serve during the third round of the U.S. The Spanish 30th seeed took advantage of an error-prone Sharapova to secure a 6-4 6-3 victory.
Ayanna Pressley defeats Michael Capuano in MA U.S. House race
A win by her would give the Democrats' progressive wing another win in their effort to pull the party leftward. Capuano is now the fourth incumbent to fall in a primary election this year, joining Republican Reps.
On Labour Day, Trump hits back at largest union leader
It is still unclear whether the United States and Canada will work out their differences in the next few weeks. A sign directing vehicles to the exit for the "Bridge to Canada" is seen in Detroit, Michigan U.S.
Federer, the five-time champion and looking to end his 10-year wait to add to his total in NY, was beaten by Australia's world No. 55 John Millman 3-6, 7-5, 7-6 (9-7), 7-6 (7-3).
Anastasija Sevastova never dreamed when she returned from a near two-year retirement in 2015 that she'd be playing in the semi-finals of a Grand Slam.
This is a rematch of the French Open final, won by Nadal in June. Just simple: "Make them play an extra ball and see what happens". The Mallorcan lost in the Melbourne quarters, won Roland Garros for an 11th time, and fell to Novak Djokovic in the Wimbledon semis this year. "I think she lost also her nerves a little bit, it's normal".
Osaka, seeded 20, came back from a break down in the final set to take the tie on a fourth match point when Sabalenka served up an eighth double fault.
Next match, can employ that strategy against No. 19 Anastasia Sevastova of Latvia.
"It was an incredible journey, this three, four years".
The 19th-seeded Latvian said the rigours of the tournament at flushing Meadows have not given her a moment to consider the long odds she overcame to regain her competitive form.