American hope Coco Gauff says she is telling herself it is still the beginning of the US Open as she tries to reach the final of her home Grand Slam tournament for the first time.
Sixth seed Gauff, 19, plays Czech 10th seed Karolina Muchova in Thursday's women's semi-finals in New York.
Belarusian second seed Aryna Sabalenka, yet to drop a set, meets American Madison Keys in the other semi-final.
"I have the mentality that I still have another two weeks to play," Gauff said.
"I think that's what I learned in the past of being in quarter-finals - before I would think I'm close to the end.