Joel Josef Schwärzler (born 27 January 2006) is an Austrian professional tennis player. He has a career-high ATP singles ranking of No. 176 achieved on 16 March 2026 and a doubles ranking of No. 202 reached on 12 January 2026. He is currently the No. 3 singles player from Austria.
Schwärzler is the son of a South African mother and an Austrian father. He grew up in Hard, Austria. He began playing tennis at the age of 5.
He began training at the ÃÂTV performance centre in Südstadt in 2021.
Schwärzler won the Austrian U18 national championship titles in singles and doubles in 2022, and followed this up by winning the U16 European Championships in July 2022 in Pà Âerov, Czech Republic, defeating top seed MartÃÂn Landaluce in the final.
The Austrian also had good results on the ITF junior circuit, maintaining a 105âÂÂ46 singles win-loss record. He was a runner-up in the boys' doubles category at the 2023 US Open, with Italian Federico Bondioli. The pair lost to Max Dahlin and Oliver Ojakäär, despite twice having a match point.
In October 2023, Schwärzler won two singles titles in a row, claiming victory at J500 event in Osaka and following that up with victory at the ITF Junior Masters event in Chengdu, China. He defeated Mexican Rodrigo Pacheco Méndez in the boysâ final. He became the first Austrian player to win the title.
At the 2024 French Open, Schwärzler won his first major jr. title, in the boys' doubles, partnering with Norwegian Nicolai Budkov Kjær.
He reached an ITF junior combined ranking of world No. 1 on 29 January 2024.
In May, Schwärzler won his first ATP Challenger Tour title at the 2024 Macedonian Open in Skopje, defeating Sergey Fomin, Ergi Kñrkñn, Andrew Paulson, Gerard Campaña Lee and Kamil Majchrzak in the process. He achieved a new career high ranking of No. 387 with the win, and became the youngest player (born in 2006) to win a Challenger title, followed by Gabriel Debru and Learner Tien who were also champions in 2024 at that level. He was also just the fourth player to win an ATP Challenger Tour title while holding the Junior No. 1 ranking after Nick Kyrgios, Taylor Fritz and Wu Yibing.
Schwärzler made his ATP debut at the 2024 Generali Open Kitzbühel, losing to Thiago Seyboth Wild in the first round. He also received a wildcard for the 2024 Erste Bank Open but lost to top seed Alexander Zverev.
On 25 August 2025 Schwärzler made the top 300 after reaching the final of the 2025 Izida Cup II but lost to qualifier Alex Molcan.