As Lindsay Davenport gets set to take over as the U.S. captain for Billie Jean King Cup, she thinks back to what she called “the most amazing” of her three championships as a player in the team competition. It was in 1999, back when the event was still known as the Fed Cup, and King was the Americans’ captain. Davenport helped beat Russia in the final with newly crowned U.S. Open champion Serena Williams, then just 17, and Venus Williams.