Serena Williams quest for a record-tying 24th Grand Slam win will have to wait until Wimbledon later this summer after she lost in the Round of 32 at the French Open on Saturday to fellow American Sofia Kenin, 6-2, 7-5.

This is 37-year-old Willliams’ earliest Grand Slam exit since Wimbledon in 2014, and Saturday’s third-round match was only the third time in her career she lost to a younger player from the U.S. Thanks to Kenin, Williams is now 34-3 against younger Americans, joining Sloane Stephens and Madison Brengle, per longtime tennis reporter Ben Rothenberg.

So who is Sofia Kenin? Here are a few things to know about Saturday’s big winner in the women’s singles in Paris.

"American tennis has a new big name on the big stage!"@SofiaKenin upsets Serena Williams in the Round of 32 of the French Open! READ: https://t.co/YzB1vfSHTH pic.twitter.com/erDPuqM8vj — NBC Sports (@NBCSports) June 1, 2019

1. Kenin is only 20 years old

To put that in perspective, Kenin was just four months old when Serena won her first WTA Tour title (at the Gaz de France tournament) in early 1999. And she had not yet celebrated her first birthday when Serena won her first Grand Slam at the 1999 U.S. Open.

2. She also goes by the name “Sonya”

So don’t be confused if you see her called Sonya Kenin.

3. Kenin is ranked No. 35 in the world

But that seems likely to change now after beating the No. 10 player in the world, especially if she continues her run at the French Open after beating Williams, a three-time champ at Roland Garros.

4. She won her first WTA title this year

On the singles side, Kenin won her first WTA title in Hobart, Tasmania in January and jumped to a career-high No. 33 ranking worldwide. She won her first doubles tournament earlier that month with partner Genie Bouchard in Auckland, New Zealand.

5. This is the first time Kenin has advanced to the second week of a Grand Slam

And that makes sense considering she’s only 20. She will face world No. 8 Ashleigh Barty on Monday in the fourth round.

6. She is coached by her father, Alexander Kenin

And the pair shared a special moment after her win Saturday as they tried to grasp the upset.

Pure emotion.@SofiaKenin shared a moment with her father after upsetting Serena Williams in the French Open. pic.twitter.com/Xne11Mk0Ko — NBC Sports (@NBCSports) June 1, 2019

7. She was born in Moscow

But she moved to the U.S. when she was a young child, and she now lives in Pembroke Pines, Florida.

8. She was a big Andy Roddick fan growing up

And she had a plan for beating him when she was only seven years old.

Omg this video is so funny 😂 Thanks @TennisChannel for posting this video of me:) Do you guys like? pic.twitter.com/xmPWyVdlHN — Sofia Kenin (@SofiaKenin) March 23, 2019

9. Kenin likes being a tourist

Even when she’s playing overseas, it’s clear from her social media accounts that she enjoys site-seeing and exploring the different cities she’s in.

Day off in Roma 🇮🇹 Being a tourist 😉 pic.twitter.com/NwgjGRVZ7q — Sofia Kenin (@SofiaKenin) May 17, 2019

Beautiful city – Seville!🇪🇸 Had a blast at Feria de Abril de Sevilla 🔥🔥 pic.twitter.com/rb7QPyxeN1 — Sofia Kenin (@SofiaKenin) May 9, 2019