Tennis's seven-time Grand Slam singles winner Mats Wilander has listed his home in the Idaho resort area of Sun Valley for $8.5 million.

The Swedish-born Mr. Wilander and his wife, Sonya, a former model, bought the roughly 80-acre parcel in the 1990s and built their main residence there in 1999. It's about a 20-minute drive southeast of Ketchum.

This 6,650-square-foot, six-bedroom apartment, in Washington, overlooking the Potomac River, has gone on the market for $10.6 million.

The 10,500-square-foot main house, contemporary in style, has a large exercise room and a soundproofed music room, and comes with a guest house, caretaker's residence, lap pool and hot tub. There's no tennis court, because the couple wanted to create a retreat away from tennis for their four children, says listing agent Trent Jones, of Hall & Hall's Sun Valley office. The 43-year-old Mr. Wilander, who won his last Grand Slam at 24, is in England coaching at Wimbledon.

Condo in Washington Priced at $10.6 Million

In Washington, a manufacturing executive has listed a condominium for what may be the city's highest-ever price for an apartment.

The 6,650-square-foot, six-bedroom apartment, in Georgetown overlooking the Potomac River, has gone on the market for $10.6 million. The owners are Eric Steiner -- chief operating officer of Fairchild Corp., which supplies motorcycle gear and airplane parts -- and his wife, Pascaline. The couple combined three units in the 70-unit Water Street building, which was built in 2004. The combined maintenance fees are $6,838 per month, plus $200 for four garage spaces. The building has a rooftop pool, fitness room and 24-hour staff. Mary Grover Ehrgood, of Washington Fine Properties, has the listing.

In Washington this year through May, only five apartments costing more than $1.5 million sold, down from 18 in the same period last year, according to the local Realtors association. The city's condo record is thought to be a Georgetown sale for $6.25 million.

Florida Estate Sells Below Its 2001 Price

British Internet entrepreneur Stuart Lawley has sold his Jupiter, Fla., riverfront mansion for $4.65 million, about 22% less than he paid for it in 2001.

Continental Realty Auctions/ Illustrated Properties

In the late 1990s, Mr. Lawley founded oneview.net, which helped businesses get on the Web, and eventually sold the company. (Recently, Mr. Lawley tried to create a separate area on the Web for pornography sites via a dot-xxx domain name.) He paid $5.925 million for the 9,700-square-foot house called "Villa Del Fiume." Built in 1998, the Mediterranean-style home is on 1.74 acres and includes a two-bedroom guest house and a dock. Jupiter, in southeast Florida, is also home to Tiger Woods.

Mr. Lawley was required to sell the house due to a divorce from his wife, Amanda, who co-owns the property, according to Les Bryant, of Continental Realty Auctions, who handled the sale with Palm Beach County-based Illustrated Properties, an affiliate of Christie's Great Estates. Mr. Lawley's ex-wife couldn't be reached for comment.

Mr. Lawley had put the house up for sale in an auction broadcast on the Web in April, seeking $4.5 million, but the home failed to find a buyer. Mr. Bryant says that a Boston-based marketing executive who saw the auction advertised but wasn't able to see the house before the event eventually bought the home.

Write to Christina S.N. Lewis at christina.lewis@wsj.com

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