Katerina Siniakova

Katerina Siniakova is, by any honest measure, one of the greatest doubles players the sport has produced — and she has built that legacy while never giving up the singles grind. Born in Hradec Králové on May 10, 1996, the Czech right-hander turned pro in 2012 and arrived as a junior phenom, sweeping three girls' doubles majors in 2013 alongside the partner who would define her career, Barbora Krejčíková. Mentored early by Helena Suková and coached by her father, a former boxer, she cracked the singles top 100 by the end of 2014.

The doubles résumé is the headline act. With Krejčíková she completed the career Golden Slam — all four majors plus Olympic gold — and the pair sat atop the rankings for long stretches as the most dominant team of their era. After that partnership wound down she kept winning majors with new partners, including Coco Gauff and Taylor Townsend, pushing her tally into double digits and adding a mixed title for good measure. Few players have lifted slam doubles trophies across so many different eras and partners.

In singles she runs counter to the power template that rules the tour. At 5-foot-9 she leans on disguise, footwork, and a flat, redirecting baseline game rather than raw pace — better in the cut-and-thrust of clay and quick courts than in a serving contest. The serve is the soft spot, but the return and her instinct for changing direction have produced top-50 singles seasons and wins over higher-ranked opponents who never get a clean look at the ball.

Now ranked 32, Siniakova continues to chase singles relevance deep into her career, a clay-court regular at events like Strasbourg and Roland-Garros — still grinding out the day job while the doubles legacy keeps growing.