Jessica Pegula was defeated in two straight sets.
Although the second set was far in and was decided first in a tiebreak: 6–3, 7–6 (7–4).
- It was a really even match.
I tried to push her back but she put pressure on me, says Polish Swiatek.
Sabalenka awaits in the semis
To the semi-finals is the longest that 21-year-old Swiatek, this year's winner of the French Championships, has so far reached in New York.
Waiting there is Belarusian Aryna Sabalenka, who earlier in the day defeated the Czech Karolina Pliskova.
That match was also decided in a tiebreak: 6–1, 7–6 (7–4).
- It will be a very difficult match.
It will be fast servers and hard shots, just like tonight, says Swiatek.