Świątek, the only former women’s champion still standing in the tournament, has not dropped a set in New York and in her 100th Grand Slam match the 23-year-old lost only four points on her first serve.
Samsonova, the 16th seed, was gunning for her first Grand Slam quarterfinal but never got into the match and failed to set up a single break point against the Pole.
Speaking after the match, Świątek said: “Well, at the beginning, I felt like we were playing kind of men’s style, you know just holding our serves, but I knew if I’m gonna keep pushing I may get some chances to break with Mila.
“So that happened in the last game of the first set and I’m happy that I was there to close it, and in the second I was, you know, leaning, and I just wanted to, you know, keep being focused, not let my mind drift, so I’m basically happy with the whole performance.”
Świątek next faces American Jessica Pegula, whom she beat in the quarterfinals two years ago.