World number five beat Cocciaretto 1-6, 6-1, 7-6 (7/1)

She defeated Gauff in a marathon 6-4, 6-7 (13/15), 6-4 match

She will face Sabalenka in the final

Jessica Pegula stunned the defending champion 6-3, 6-4

The Kazakh fired 15 aces and won 73 percent of her first-serve points on her way to a hard-fought win.

The 21-year-old American defeated world number six 6-4, 7-5 to claim her second title of the year

The Belarusian hasn't dropped a set en route to her fifth straight US Open semi-final

Russian fourth seed defeats world number three 6-4, 4-6, 7-6 (7/5) in 2hr 45min

World number five prepares for ATP-WTA United Cup this week

Polish star defeats fifth seed 6-1, 6-0 to reclaim her world number one ranking spot