The 21-year-old had never even reached the quarterfinals of a major tournament up until this week, but is now on the verge of becoming the first American since Serena Williams in 2017 to win at Melbourne Park.

The No.14 seed pulled off one of the upsets of the tournament in the semifinal, defeating world No. 1 Ashleigh Barty 7-6 (8-6), 7-5.

Aiming to become the first Australian woman to play in the final at Melbourne Park since Wendy Turnbull in 1980, Barty failed to convert two set points each set and ultimately paid the price.

“I’m speechless. I can’t believe it. I’ve dreamed of this since I was five years old. I’ve worked so hard to get here,” the American said after the match.

Kenin has dropped just one set so far in the tournament—against Coco Gauff in the fourth round—and is the first American to reach the Australian Open final other than Williams since Lindsay Davenport 15 years ago.

Born in Russia, Kenin moved to the U.S. as a kid and developed into a child prodigy. Her parents had fled the Soviet Union for New York in 1987, before returning to Moscow.

Over the last three years, the 21-year-old has steadily developed into one of the most promising young players on the circuit and could land her first major tournament on Saturday.

“It means everything,” Kenin said on ESPN after her semifinal win. “I’ve been dreaming of this since I was little. It hasn’t sunk in yet.”

Muguruza, meanwhile, defeated two-time Grand Slam winner Simona Halep 7-6 (10-8), 7-5 in the semifinal in just over two hours to reach the Australian Open final for the first time.

The Spaniard saved four set points in the first set and twice came from a break down in the second to defeat Halep, who at No. 4 was the highest-seeded player left in the tournament.

“I’m very excited to be in the final, it is a long way to get there,” Muguruza told reporters after the match. “I wasn’t thinking I was down, I just thought keep going and knew I’d have an opportunity. I was hanging in there and fighting with all the energy I had.”

Unlike Kenin, her opponent on Saturday was not seeded at the Australian Open but has enjoyed a remarkable run of form in Melbourne.

A two-time Grand Slam winner, Muguruza last tasted success in a major tournament when she won her first Wimbledon crown in 2017, just over 12 months after winning the French Open.

Since her triumph at the All-England Club, however, the Spaniard reached just one Grand Slam semifinal in the last two years—at the French Open in 2018.

The 26-year-old has looked to be back at her best at the Australian Open, where she has accounted for three of the top 10 seeds—Halep, Elina Svitolina in the third round and Kiki Bertens in the fourth round.

Here’s everything you need to know ahead of Saturday.

Women’s final start time

The final of the Australian Open gets underway at 7:30 p.m. local time on Saturday.

Because of the 16-hour difference between Melbourne and the east coast of the U.S., the match will be played at 3:30 a.m. ET on Saturday.

TV channel

Coverage on ESPN begins at 3:30 a.m. ET on Saturday and runs until 5:30 a.m. A replay will be available on ESPN2 between 8 a.m. and 11 a.m. on Saturday.

Live stream

Fans can watch the action online via the WatchESPN app and on ESPN.com.