Baseline is looking ahead to the new year by showcasing 21 players under 21 to watch out for in '21. To make the coveted list, players must be born in 2000 or later.

With significant successes at the junior and ITF levels, Kaja Juvan is poised to break through on the WTA Tour at any moment. And despite the limited opportunities available in 2020, the Slovenian's gotten closer: winning three qualifying matches to make the Australian Open and picking up main-draw victories at the US Open and Roland Garros.

The French Open win over No. 22 Angelique Kerber, plus the set she took off Serena Williams at Wimbledon in 2019, shows that Juvan's next big step could be right around the corner.

Ranking: No. 104

Age: 20 (Nov. 25, 2000)

What she did in 2020: Strung three wins together to qualify for the Australian Open; notched main-draw triumphs at the US Open and Roland Garros

Instagram: @kajajuvan​


Career highlights: 2016 Orange Bowl champion, 2017 Wimbledon girls'-doubles champion, and winner of seven ITF singles titles.