2003 Davis Cup
The 2003 Davis Cup was the 92nd edition of the most important tournament between nations in men's tennis. A total of 135 nations participated in the tournament. In the final, Australia defeated Spain at Rod Laver Arena in Melbourne, Australia, on 28–30 November, giving Australia their 28th title.
World Group
Draw
First round losers compete in Play-off ties with Zonal Group I Qualifiers.Final
World Group Play-offs
Date: 19–21 September| Home team | Score | Visiting team | Location | Venue | Door | Surface |
| ' | 3–2 | Pörtschach | Werzer Arena Pörtschach | Outdoor | Clay | |
| ' | 3–2 | Calgary | Stampede Corral | Indoor | Carpet | |
| 1–4 | ' | Bangkok | Impact, Muang Thong Thani | Indoor | Hard | |
| 2–3 | ' | Sundern | TC Blau-Weiss Sundern | Outdoor | Clay | |
| ' | 3–2 | Casablanca | Complex Sportif Al Amal | Outdoor | Clay | |
| ' | 5–0 | Zwolle | IJsselhallen | Indoor | Hard | |
| 2–3 | ' | Quito | Quito Tenis Y Golf Club | Outdoor | Clay | |
| 2–3 | ' | Bratislava | National Tennis Centre | Outdoor | Clay |
- , , and will remain in the World Group in 2004.
- ,, and are promoted to the World Group in 2004.
- ,, and will remain in Zonal Group I in 2004.
- ,, and are relegated to Zonal Group I in 2004.
Americas Zone
Group I
;Participating Teams- — relegated to Group II in 2004
- — advanced to World Group Qualifying Round
- — advanced to World Group Qualifying Round
Group II
- — relegated to Group III in 2004
- — relegated to Group III in 2004
- — promoted to Group I in 2004
Group III
- — relegated to Group IV in 2004
- — promoted to Group II in 2004
- — promoted to Group II in 2004
- — relegated to Group IV in 2004
Group IV
- Eastern Caribbean
- — promoted to Group III in 2004
- — promoted to Group III in 2004
Asia/Oceania Zone
Group I
;Participating Teams- — advanced to World Group Qualifying Round
- — relegated to Group II in 2004
- — advanced to World Group Qualifying Round
Group II
- — promoted to Group I in 2004
- — relegated to Group III in 2004
- — relegated to Group III in 2004
Group III
- — promoted to Group II in 2004
- — relegated to Group IV in 2004
- — promoted to Group II in 2004
- Pacific Oceania
- — relegated to Group IV in 2004
Group IV
- — promoted to Group III in 2004
- — promoted to Group III in 2004
Europe/Africa Zone
Group I
;Participating Teams- — advanced to World Group Qualifying Round
- — advanced to World Group Qualifying Round
- — relegated to Group II in 2004
- — advanced to World Group Qualifying Round
- — relegated to Group II in 2004
- — advanced to World Group Qualifying Round
Group II
- — relegated to Group III in 2004
- — relegated to Group III in 2004
- — relegated to Group III in 2004
- — promoted to Group I in 2004
- — relegated to Group III in 2004
- — promoted to Group I in 2004
Group III
Venue I
;Participating Teams- — promoted to Group II in 2004
- — relegated to Group IV in 2004
- — relegated to Group IV in 2004
- — promoted to Group II in 2004
Venue II
- — relegated to Group IV in 2004
- — promoted to Group II in 2004
- — promoted to Group II in 2004
- — relegated to Group IV in 2004
Group IV
Venue I
;Participating Teams- — promoted to Group III in 2004
- — promoted to Group III in 2004
Venue II
- — promoted to Group III in 2004
- — promoted to Group III in 2004