NEW YORK — Back in January, when Aryna Sabalenka was winning a second consecutive Australian Open title, Jessica Pegula was bowing out in the second round with a straight-set loss against someone ranked 51st.

It wasn’t the first setback for Pegula, of course. There have been many of those through the years, from assorted injuries to difficult-to-digest defeats. Look at her now, though: On Saturday, the No. 6-seeded Pegula will face No. 2 Sabalenka for the championship at the U.S. Open.

“If you would have told me at the beginning of the year I’d be in the finals of the U.S. Open, I would have laughed so hard, because that just was where my head was — not thinking that I would be here,” Pegula, a 30-year-old American, said Thursday night after coming back to earn her first shot at a Grand Slam trophy with a 1-6, 6-4, 6-2 victory over Karolina Muchova in the semifinals at Flushing Meadows.

“So to be able to overcome all those challenges, and say that I get a chance at the title Saturday, is what we play for as players — let alone being able to do that in my home country here, in my home Slam,” Pegula said. “It’s perfect, really.”

Since moving to hard courts after the Paris Olympics on clay, Pegula has gone 15-1, with a title at Toronto and a runner-up finish at the Cincinnati Open before the success over the past two weeks.

It hasn’t exactly always been a smooth ride for Pegula, the oldest U.S. woman in the Open era, which began in 1968, to reach her first major singles final.

There was, for example, a 2013 knee problem that required surgery. And a hip operation that sidelined Pegula for more than half of 2017, leaving her ranking outside the top 850 and forcing her to work her way back up via lower-tour events. This season, a rib injury kept her out of action for two months, sidelining her for the French Open. On the court, there was a seven-match Grand Slam losing streak that ended in New York in 2020. And an 0-6 record in major quarterfinals until this week, when she outplayed No. 1 Iga Swiatek, a five-time Slam champion, at that stage.

Surely, at some point along the journey, Pegula lost hope of ever fulfilling her childhood goal of winning one of her sport’s four most prestigious tournaments, right?

No, not really.

Yes, she acknowledged, there were “those type of low moments,” as she put it, where there was some doubt whether she “wanted to do it anymore.”

“But, I think, in the end, I always would kind of snap back and be, like, ‘OK, what am I talking about?’ I would always kind of flip the script a little bit, and I have always been good at doing that. That’s why I’ve always been able to come back from different challenges even better than before,” explained Pegula, who was born in New York and whose parents own the NFL’s Bills and NHL’s Sabres. “Honestly, I’ve always felt, like, not that it was never going to happen — I almost think the opposite,” she continued. “I always felt like: ‘You know what? You’ll figure it out eventually.’”

“Eventually” sure seems to be right now.