1986 Davis Cup
The 1986 Davis Cup was the 75th edition of the Davis Cup, the most important tournament between national teams in men's tennis. This year's tournament marked the introduction of the Africa Zone, which served as a qualifying sub-round for the Europe Zone. 71 teams would enter the competition, 16 in the World Group, 33 in the Europe Zone, 13 in the Eastern Zone, and 9 in the Americas Zone. Bangladesh Davis [Cup team|Bangladesh], Ivory Coast, Libya, Malta and Syria made their first appearances in the tournament.
Australia defeated the two-time defending champions Sweden in the final, held at the Kooyong Stadium in Melbourne, Australia, on 26–28 December, to win their 26th Davis Cup title.
World Group
Draw
Final
'''Australia vs. Sweden'''Relegation play-offs
Date: 3–5 October| Home team | Score | Visiting team | Location | Door | Surface |
| ' | 5–0 | Essen | Indoor | Carpet | |
| ' | 5–0 | Barcelona | Outdoor | Clay | |
| ' | 4–1 | New Delhi | Outdoor | Grass | |
| ' | 3–2 | Asunción | Outdoor | Clay |
- ,, and remain in the World Group in 1987.
- ,, and are relegated to Zonal competition in 1987.
Americas Zone
- are promoted to the World Group in 1987.
Eastern Zone
- are promoted to the World Group in 1987.
Europe Zone