PICTURES: Marta Kostyuk poses in red bikini as she shares glimpses from Dubai vacation with family

As the 2025 year nears its end, Marta Kostyuk shared a few highlights of her memorable moments from December. The Ukrainian tennis star reached a career-high ranking of World No. 16 on the WTA Tour's singles rankings in the 2025 season.

Currently ranked at No.26, Kostyuk took to social media on Tuesday, December 30, 2025, and shared glimpses of her year-end celebration with family. Kostyuk appeared ecstatic as she soaked in the picturesque background of the ocean in Dubai, United Arab Emirates. The young tennis prodigy was seen donning a red bikini while embracing the celebratory moments.

Kostyuk was also seen enjoying water sports, as she shared a picture of herself riding a water jet. In one of the videos, she was seen having fun on a ride while trailing behind it. The Ukrainian also appeared to be relaxing and soaking in a serene sunset. She then gave a glimpse of her family savoring the beautiful scene while wearing a black bikini, which she paired with a white shirt. Sharing the pictures, she captioned it:

"The best part of this December 🥹"

Kostyuk was born to Talina Beiko and Oleg Kostyuk in Kyiv, Ukraine, in 2002. Her mother, Beiko, was a professional tennis player who later turned coach. Her father was the technical director of a junior tennis tournament. Kostyuk has two sisters, Mariya and Zoryana. The former also played tennis for the Chicago State University and later Southeast Missouri State University.

"I kept showing up and doing the work" - Marta Kostyuk makes her feelings known about the 2025 season

Marta Kostyuk of Ukraine at the Wuhan Open in Wuhan, China (Photo by Getty Images)

Marta Kostyuk opened up about her 2025 season, stating that although it was a difficult year, it was steady and important for her. She stated that she kept showing her resilience despite the difficulties.

“This season has been one of the most consistent and meaningful in my career. It wasn’t easy, but I kept showing up and doing the work, no matter what was happening around me,” Kostyuk wrote. “There were weeks when I didn’t even know if I’d be able to play, and moments that tested me in every possible way. “This year also made me look at tennis differently. It’s such a self-centered world: everything revolves around you, your body, your goals, and your mindset. But once I saw it for what it is, something shifted. I started to notice more, to find meaning beyond results, and to appreciate the journey itself.”

Although Marta Kostyuk achieved a career-high ranking this year, she failed to enter the second round at Roland Garros.

Edited by Janhavi Shinde