1991 Davis Cup
The 1991 Davis Cup was the 80th edition of the Davis Cup, the most important tournament between national teams in men's tennis. 88 teams would enter the competition, 16 in the World Group, 20 in the Americas Zone, 20 in the Asia/Oceania Zone, and 32 in the Europe/Africa Zone. Congo, the Eastern Caribbean, El Salvador and Saudi Arabia made their first appearances in the tournament.
This year's tournament saw the Germany Davis Cup team representing all parts of Germany for the first time since 1939, following the reunification of West and East Germany into a single German state in October 1990. The breakup of Yugoslavia during the tournament also resulted in impacts for the Yugoslavia Davis Cup team, after high-profile Croatian players Goran Ivanišević and Goran Prpić withdrew from the Yugoslav team following Croatia's declaration of independence in June 1991.
France defeated the United States in the final, held at the Palais des Sports de Gerland in Lyon, France, on 29 November–1 December, to win their first title since 1932 and their 7th title overall.
World Group
Draw
Final
France vs. United StatesWorld Group Qualifying Round
Date: 20–22 SeptemberThe eight losing teams in the World Group first round ties and eight winners of the Zonal Group I final round ties competed in the World Group Qualifying Round for spots in the 1992 World Group.
| Home team | Score | Visiting team | Location | Venue | Door | Surface |
| ' | 3–1 | Manchester | Northern Lawn Tennis Club | Outdoor | Grass | |
| ' | 4–1 | Brussels | Royal Primerose Tennis Club | Outdoor | Clay | |
| ' | 4–1 | São Paulo | Esporte Clube Pinheiros | Outdoor | Clay | |
| 2–3 | ' | Havana | Complejo de Canchas | Outdoor | Hard | |
| ' | 4–1 | Bari | Bari Tennis Club | Outdoor | Clay | |
| 0–5 | ' | Mexico City | Club Alemán de México | Outdoor | Clay | |
| ' | 5–0 | Baden | Bareeg Tennis Club | Indoor | Carpet | |
| 0–5 | ' | Manila | Ninoy Aquino Stadium | Indoor | Carpet |
- ,, and remain in the World Group in 1992.
- ,, and are promoted to the World Group in 1992.
- ,, and remain in Zonal Group I in 1992.
- ,, and are relegated to Zonal Group I in 1992.
Americas Zone
Group I
- and advance to World Group Qualifying Round.
- relegated to Group II in 1992.
Group II
- promoted to Group I in 1992.
Asia/Oceania Zone
Group I
- relegated to Group II in 1992.
- and advance to World Group Qualifying Round.
Group II
- promoted to Group I in 1992.
Europe/Africa Zone
Group I
- ,, and advance to World Group Qualifying Round.
- and relegated to Group II in 1992.
Group II Europe
- promoted to Group I in 1992.
Group II Africa
- promoted to Group I in 1992.