Justin Gimelstob, once a rising star in American tennis, has evolved into a multifaceted figure within the sport—serving as a professional player, commentator, coach, and philanthropist. As of 2025, his net worth is estimated at $8 million, reflecting a career that spans athletic excellence, media presence, and impactful charitable work. Now 48 years old, Gimelstob continues to contribute to tennis and community causes from his home base in Santa Monica, California.
Early Life and Tennis Beginnings
Born on January 26, 1977, in Livingston, New Jersey, Justin Jeremy Gimelstob was introduced to tennis at the age of eight. Raised in a close-knit Jewish family by parents Barry and Patricia Gimelstob, he grew up alongside his brothers Joshua and Russell. Justin quickly distinguished himself on the court, winning numerous junior tournaments and gaining national recognition by his teenage years.
Gimelstob attended Newark Academy, where he was both a standout student and athlete, leading the school’s tennis team to multiple state championships. His talent earned him a spot at UCLA, a premier tennis institution, though he ultimately chose to leave college early and turn professional in 1996.
Professional Tennis Career: Doubles Dominance and Grand Slam Success
Gimelstob’s decision to go pro was validated by a steady climb in both singles and doubles rankings. Though he achieved a respectable career-high singles ranking of No. 63 in April 1999, it was in doubles that he truly made his mark. Known for his aggressive serve-and-volley style, sharp net play, and strategic thinking, he captured 13 ATP doubles titles over the course of his career.
His career highlight came in 1998, when he teamed up with Venus Williams to win two Grand Slam mixed doubles titles—one at the Australian Open and the other at the French Open. These victories placed him among an elite group of players who have earned multiple Grand Slam titles in doubles disciplines. He also represented the U.S. in international events, contributing to a Hopman Cup victory in 1997 and competing on the Davis Cup team in both 1998 and 2001.
Transition to Broadcasting and Coaching
Gimelstob retired from professional tennis in 2007, but he remained closely tied to the sport. He quickly established himself as a knowledgeable and charismatic voice in broadcasting, becoming a lead analyst for Tennis Channel. His in-depth commentary and ability to explain the technical aspects of tennis made him a respected figure in sports media.
In 2014, he expanded his role in tennis by stepping into coaching. He began working with John Isner, one of America’s top men’s players. Under Gimelstob’s guidance, Isner reached career milestones, including a semifinal run at Wimbledon in 2018, helping to solidify Gimelstob’s reputation as a skilled strategist off the court as well.
Family Life and Personal Milestones
In May 2012, Justin married Cary Kendall Sinnott in a private ceremony at the Ritz-Carlton in Laguna Niguel, California. The couple has since welcomed a son, and Gimelstob has often spoken about how fatherhood has reshaped his priorities. Now residing in Santa Monica, he continues to balance his professional commitments with a strong focus on family.
Despite the intensity of his schedule over the years, Gimelstob remains deeply committed to maintaining a stable home life. He has largely kept his family out of the public eye, preferring to share only selective moments from his personal life.
Financial Profile: A Career Beyond the Court
With a current net worth of $8 million, Gimelstob’s earnings come from a mix of prize money, endorsement deals, broadcasting contracts, and coaching fees. His tennis career alone brought in more than $2.5 million in prize money. His transition into broadcasting and coaching extended his professional relevance, while several private investments and media ventures added to his financial portfolio.
Though not among the highest-earning athletes in tennis history, Gimelstob’s long-term approach to career development, brand management, and post-retirement planning has enabled him to build a stable and diversified financial foundation.
Philanthropy: Giving Back Through the Justin Gimelstob Children’s Fund
Off the court, one of Gimelstob’s most meaningful accomplishments is his commitment to philanthropy. In 1998, he founded the Justin Gimelstob Children’s Fund, an organization dedicated to supporting children’s health and education initiatives. Over the years, the fund has hosted numerous fundraising events—often involving celebrities and fellow athletes—to raise money for causes such as The Valerie Fund, which supports children battling cancer and blood disorders.
Through his foundation, Gimelstob has helped provide critical financial assistance to families in need, emphasizing not only direct impact but also community engagement and awareness. His hands-on approach has earned him praise within both the tennis and philanthropic communities.