High Quality Content by WIKIPEDIA articles! The 1988 Davis Cup was the 77th edition of the most important tournament between national teams in men`s tennis. For the first time, the Zones were divided into two groups, with promotion and relegation between the two. The Eastern Zone was also renamed the Asia/Oceania Zone. A total of 74 nations participated in the tournament. In the final, West Germany defeated Sweden at the Scandinavium in Gothenburg, Sweden, on 16–18 December.