Partnership and Perfection: Townsend and Siniaková’s Tennis Triumph

Since the spring of 2024, Taylor Townsend and Kateřina Siniaková have been a formidable duo on the tennis court. By fall 2025, during a practice in Riyadh, they had already achieved notable success including two Grand Slam doubles titles and a runner-up finish at the 2025 U.S. Open. Yet, it was at this moment Townsend truly appreciated Siniaková’s game. She noticed the impeccable precision of her footwork and her powerful, fluid moves.

Competitive focus often narrows perspectives during matches. It wasn’t until this calmer environment that Townsend truly admired her partner’s talent. Recalling a particular drill, Townsend told reporters, “Now I see why she’s the best in the world.” Despite the focus on singles players in tennis, Siniaková and Townsend have made significant achievements.

At the U.S. Open, they reached new heights. In the women’s doubles final, they triumphed over American wild cards Robin Montgomery and Ashlyn Krueger with scores of 5-7, 6-0, 6-2. This victory marked a career Grand Slam for Townsend, a milestone only achieved by 18 women since the Open Era began in 1968. Siniaková, meanwhile, became the ninth woman to complete the career Grand Slam twice, an unprecedented feat achieved with different partners. Her first came alongside Barbora Krejčíková, also a Grand Slam singles champion.

Winning the U.S. Open with Townsend added a 12th Grand Slam doubles title to Siniaková’s name and her 39th women’s doubles title overall. Their record improved to 81-16, remaining undefeated in finals for 2026. “Big thanks to Taylor,” Siniaková said during the trophy presentation. “Thank you for staying by my side.”

Only eight women have won at least 12 Grand Slam doubles titles in the Open Era. Martina Navratilova leads with 31. Should Siniaková end the season as the doubles world No. 1, surpassing Navratilova’s record for the most year-end No. 1 finishes in WTA history.

Unlike many of her peers, Siniaková doesn’t specialize in doubles only. She’s been a top-75 singles player since 2014 and has stayed in the top-50 since 2023. Her highest singles ranking was No. 27 in 2024. Her best singles Grand Slam result was reaching the fourth round of the 2019 French Open. Yet, with a partner, her game flourishes even more, a trend dating back to her first Grand Slam win in 2018 with Krejčíková.

Instead of fearing losses, Siniaková finds motivation in her desire to frequently recapture the joy of victory. “I wanted to feel those feelings again,” she explained. After winning her first Slam, she was driven to experience success repeatedly.

She expertly chooses partners. This included inviting Townsend to join her after Storm Sanders was injured in 2024. Despite Townsend’s commitment to Brazilian Beatriz Haddad Maia, she accepted Siniaková’s invitation. Their resulting partnership led to seven titles based on a strong off-court connection. Their friendship goes back to age 13, though it’s only in recent years they’ve grown close.

The bond extends beyond tennis courts. Townsend has visited Siniaková’s family in the Czech Republic, while Siniaková has stayed with Townsend in Atlanta. They support each other’s singles matches, strengthening their partnership. Townsend appreciates the mutual understanding, saying, “There are big cultural differences… but we do see eye to eye on a lot of things.”

Townsend’s fondness for Czech culture now includes a few words of the language. Her young son often asks about Siniaková and humorously suggests alternative careers for Townsend. Laughing at the idea, she acknowledged her tennis journey continues. Together with Siniaková, they’ve made more history on the court.

This article is a segment of the Winning Style series, sponsored by Ralph Lauren. The Athletic’s editorial stance remains independently upheld, with sponsors having no influence on content.