Tennis star Caroline Wozniacki and her husband, former New York Knicks player David Lee, are listing their Miami-area penthouse for $42.5 million.

The couple purchased the condo unit, at Palazzo Del Sol on Fisher Island, for $18.7 million in June of 2021, records show. They had previously owned a lower-floor unit, which they sold earlier that year for $16.25 million.

The five-bedroom penthouse has about 7,000 square feet of interior space plus two terraces, according to listing agent Dina Goldentayer of Douglas Elliman. The unit was purchased as raw space, she said, and the couple reconfigured the floor plan as part of a “budget-less renovation,” adding high-end finishes such as white-oak floors and a custom bar overlooking Biscayne Bay. One of the terraces has a fire pit and hot tub, while the rooftop contains a private pool and summer kitchen.

Wozniacki and Lee couldn’t be reached for comment. Goldentayer said she doesn’t know why they are selling.

Wozniacki, originally from Denmark, has been ranked the number one tennis player multiple times during her career, winning a Grand Slam in 2018. She retired from professional tennis in 2020 before rejoining the professional tour this year. Lee, who is from St. Louis, played for the New York Knicks and the Golden State Warriors before retiring from professional basketball in 2017. The couple married in 2019 and have two 𝘤𝘩𝘪𝘭𝘥ren.

The unit’s asking price is in line with new projects on Fisher Island, Goldentayer said. A penthouse at the Residences at Six Fisher Island that was asking $90 million is in contract, according to the developer.

Goldentayer said the ultra-high-end market in Miami is thriving, and she is having an easier time selling units priced between $30 million and $50 million than anything else. At the top of the market, she said, the inventory is extremely limited. “When something checks a lot of boxes—the right amount of space, has the open downtown ocean view—buyers know it’s going to get scooped up and they act fast,” she said.