DAVIE, Fla. — The Williams sisters stood at the edge of the Miami Dolphins' practice field, easy to spot in elegant, color-coordinated beige dresses and high heels that dug into the turf.

The team's workout had ended, and it was time for introductions. Joey Porter, meet Serena Williams. Jason Taylor, meet Venus Williams.

The NFL and the best of women's tennis converged Tuesday when the Williamses paid a visit to the Dolphins' complex as the latest celebrities to buy a small stake in the franchise. Their deal with owner Stephen Ross, first reported last week, was confirmed at a news conference overlooking the field.

Venus and Serena live in Palm Beach Gardens, Fla., about an hour's drive from the Dolphins' stadium.

"To have this opportunity is really where our heart is," Venus said. "We're South Florida girls. When we get off the road, this is where we come home to. When we come home to Dolphins games, it's going to be exciting."

Venus said she and Serena have been to "a few games." Serena dated former NFL players LaVar Arrington and Keyshawn Johnson, but the sisters said the Dolphins have long been their favorite team.

"We're just 'Go Fins!'-type people," Serena said.

"It's great going to the games for us," Venus said. "When we play tennis, you're so focused you don't really get to feel that atmosphere. When we go to a Dolphins game, we get to soak in the atmosphere."'

The sisters are the first female African-Americans to hold an ownership stake in an NFL franchise, the Dolphins said. The league has no African-American majority owner.

Ross, a New York real estate billionaire, has brought six celebrities into the fold since completing his purchase of the Dolphins from Wayne Huizenga in January. The first partnership was with singer Jimmy Buffett; musicians Gloria and Emilio Estefan and Marc Anthony subsequently bought small shares of the team.

The Estefans are the first Cuban-Americans to hold an ownership stake in an NFL team.