All about her 12-carat diamond from Georgios Frangulis

Aryna Sabalenka’s new ring is a grand slam.

The world No. 1 tennis star, 27, is engaged to fiancé Georgios Frangulis. The Brazilian entrepreneur, 37, proposed on Mar. 3 in front of an elaborate display of roses and candles, presenting a custom 12-carat oval diamond ring set in platinum, accented with emeralds — Sabalenka’s favorite stone.

Sabalenka shared the news on Instagram, captioning her post, “You & me, forever ♾️ 3.3.26 💍🤍” and drawing congratulations from famous friends like David Beckham, Novak Djokovic and Coco Gauff.

The ring was designed by Isabela Grutman, founder and CEO of Isa Grutman Jewelry, who worked with Frangulis to perfect the piece.

“We spent months working on the design, selecting the stones, and perfecting every detail of the craftsmanship to make it truly special for Aryna,” Grutman told the Daily Mail. “What made it even more meaningful was Georgios’ idea to incorporate emeralds into the design, as it’s her favorite stone — a personal touch that makes the ring uniquely hers.”

Rustin Yasavolian, CEO at Masina Diamonds, told the publication the ring is worth an estimated $500,000 to $800,000.

That puts it in the company of some serious celebrity sparklers. Kourtney Kardashian’s oval-cut ring from Travis Barker — designed by Lorraine Schwartz and estimated at around 10 to 12 carats — is believed to be worth about $1 million, while Kris Jenner’s heart-cut diamond — which she debuted in 2023 — clocks in at about 10 carats and $1.2 million, experts told Page Six Style.

Sabalenka dropped a very public hint to Frangulis earlier this year, joking at the Brisbane International in January, “Thank you to my boyfriend … hopefully soon I can call you something else.”

The four-time Grand Slam champion nodded to the comment in a second post about the engagement, writing, “I can finally call him something else… FIANCÉ 💍”

The actual moment, however, clearly caught her off guard. In footage of the proposal, she’s wearing baggy jeans and a white T-shirt, along with flip-flops and a loose braid.

In a video posted by the WTA, the Belarusian tennis pro walks into practice carrying her dog and flashing her ring when someone behind the camera asks if she was surprised.

“I mean, obviously,” she said with a laugh. “Did you see my outfit and no-makeup look and flip-flops?”

When asked how she’s doing, she responds with a laugh, “Feeling shiny!”

Grutman also shared a behind-the-scenes Reel documenting her process, from inspecting the stone to reviewing CAD images.

“I’m analyzing this 12-carat oval diamond,” she said. “When I have the future husband pick the perfect ring and stones, I analyze first about the woman. What is she like? Is she more modern? Is she more classic?”

Sabalenka is currently competing at the Indian Wells Open in California with Frangulis cheering her on courtside — and now, a little extra sparkle on her left hand.