Tennis pros Alex de Minaur and Katie Boulter are engaged!

Boulter, 28, announced the news via Instagram on Monday, December 23.

“We’ve been keeping a small secret … 🤭,” she captioned a photo of her and de Minaur, 25, standing cheek to cheek. Boulter posed with her arm around de Minaur in the snap, showing off an emerald cut diamond engagement ring.

In a post that Boulter shared one week prior, she was dressed in the same clothes and posing at the same waterside location seen in the engagement announcement.

“Today was a good day,” she captioned the picture of herself, seemingly hinting at the proposal.

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The tennis power couple began dating in March 2020. Boulter previously shut down engagement speculation when celebrating the duo’s anniversary earlier this year.

“4 years with you ♥️ (calm down not engaged 😂 just the only finger that ring fits. ),” she captioned a March Instagram photo of her and de Minaur smiling at each other. She wore a gold band on her ring finger in the picture.

Boulter, who is currently the British No. 1 in women’s singles, took a moment to gush about her now-fiancé in September.

“Couldn’t be prouder of this man. My forever inspiration,” she captioned several photos of the twosome’s trip to New York City for the U.S. Open. At the event, de Minaur reached his third consecutive Grand Slam quarterfinal of the season before losing in straight sets to Jack Draper.

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The Australian athlete, who reached a career-high ATP singles ranking of No. 6 in July, told reporters on Sunday, December 22, that despite having his “best year to date” he is “not satisfied” yet.

“I want more. I want to keep pushing myself,” de Minaur said, per Nine’s Wide World of Sports. “I want to one day finish my career knowing that I gave the absolute max and everything I could do to be the best possible tennis player.”

Despite being united by their recent engagement, de Minaur and Boulter will soon be rivals when Great Britain takes on Australia at the United Cup in Perth on New Year’s Day.

“I don’t think he’s going to be out there cheering for me. Obviously, I’m always supporting him, I support what he does,” Boulter admitted while discussing the upcoming match with Sky Sports on Sunday. “In that match, it’s a very unique situation and something that I’m not that used to. We’ll just try to handle it the best we possibly can, and I’ll be supporting him every single time from the box for the rest of the year.”

While the pair will be rooting against each other on January 1, de Minaur previously celebrated when he and Boulter won titles on the same day. In June, de Minaur won his second grass-court tour-level title in Hertogenbosch, beating Sebastian Korda just hours before Boulter defeated Karolina Pliskova in the Nottingham trophy match.

“Double trouble 🏆X🏆 Another unreal week 🤯😍❤️ @katiecboulter,” de Minaur captioned side-by-side photos of him and Boulter on the court at the time.