The World Group was the highest level of Davis Cup competition in 2000. The first-round losers went into the Davis Cup World Group qualifying round, and the winners progressed to the quarterfinals and were guaranteed a World Group spot for 2001.

Spain won the title, defeating the defending champions Australia in the final, 3–1. The final was held at the Palau Sant Jordi in Barcelona, Spain, from 8 to 10 December. It was the Spanish team's first Davis Cup title.