The World Group was the highest level of Davis Cup competition in 1989.

[1] 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 1990.

West Germany won the title for a second consecutive year, defeating Sweden in the final, 3–2.

The final was held at the Schleyer-Halle in Stuttgart, West Germany, on 15–17 December.

[2] It was the West Germany team's 2nd Davis Cup title overall.