Ryan Seggerman (born August 6, 1999) is an American tennis player. He has a career-high ATP doubles ranking of world No. 63 achieved on September 22, 2025 and a singles ranking of No. 348 achieved on August 26, 2024.
Seggerman played college tennis at Princeton before transferring to North Carolina.
Seggerman won his first ITF singles title in 2023 at the M25 Monastir tournament, defeating Ilia Simakin in the final. With fellow American Patrik Trhac, the duo won eight consecutive ITF doubles titles between July and October 2023.
The pair won their first ATP Challenger doubles title at the 2023 City of Playford Tennis International, and then won the 2023 NSW Open title the following week.
Seggerman reached the semifinals as a qualifier at both the 2024 Macedonian Open and at the 2024 Cranbrook Tennis Classic.
Seggerman reached the main draw as a qualifier at the 2024 Lexington Challenger, rising into the top 400 for the first time in 5 August 2024. He reached the quarterfinals of the RD Open, giving him a new career-high ranking of No. 350 on 19 August 2024. Seggerman received entry into the 2024 Winston-Salem Open qualifying singles draw, but lost in the first round.
In January 2024, following back to back Challenger titles in 2024 Indian Wells, Seggerman and Trhac received a wildcard for the Masters 1000 2024 BNP Paribas Open, making their ATP debut. The pair defeated sixth-seeded Máximo González and Andrés Molteni in the first round. In the round of 16, they lost to eventual champions Wesley Koolhof and Nikola MektiÃÂ.
After 13 straight victories in ITF circuit and ATP Challenger Tour finals, the pair lost their first final at the 2024 Upper Austria Open. With Trhac, the pair received entry into the 2024 Libéma Open, their second tour-level event. As a result, Seggerman reached the top 100 in doubles on 24 June 2024.
With Trhac, the duo won the 2024 Cranbrook Tennis Classic, their seventh Challenger level title. As a result, Seggerman rose to a new career high doubles ranking of No. 89 on 15 July 2024.
Seggerman and Trhac received a wildcard to the 2024 US Open, making their Grand Slam debut but lost in the first round to Yuki Bhambri and Albano Olivetti.
Seggerman and Szymon Walków reached the final at the 2024 Szczecin Open. This gave Seggerman a new career high doubles ranking of world No. 87 on 16 September 2024.
Seggerman began his 2025 campaign with a doubles title at the 2025 Canberra challenger, partnering countryman Eliot Spizzirri. The pair saved a championship point in their title match win over Pierre-Hugues Herbert and Jérôme Kym.
Seggerman made his Australian Open debut in the doubles tournament alongside Rithvik Choudary Bollipalli. The duo lost in straight sets to eventual champions Harri Heliövaara and Henry Patten.
Following the Australian Open, Seggerman partnered with John-Patrick Smith and they lost in the qualifying final in Dallas, the first round in Delray Beach, and the first qualifying round in Rio de Janeiro. They picked up their first two wins together at the 2025 Chile Open, reaching the semifinals before losing to top-seeded Máximo González and Andrés Molteni. As a result, Seggerman reached a career-high doubles ranking of No. 71 on 3 March 2025.
At the 2025 BNP Paribas Open, Seggerman rejoined Trhac at the same tournament where they won their first ATP match a year prior. The pair received entry as alternates, and defeated a team of top-20 singles players, Karen Khachanov and Andrey Rublev 6âÂÂ2, 6(4)âÂÂ7, [10âÂÂ7].
At the 2025 Serve First Open, Trhac and Seggerman won their 10th Challenger doubles title together, defeating Sriram Balaji and Rithvik Choudary Bollipalli in the final.