The 2003 ARAG World Team Cup was a tennis tournament played on outdoor clay courts. It was the 25th edition of the World Team Cup and was part of the International Series of the 2003 ATP Tour. It took place at the Rochusclub in Düsseldorf in Germany from May 18 through May 24, 2003.
Argentina were the defending champions but were eliminated in the round robin stage.
Chile defeated the Czech Republic in the final to win the title for the first time.
| width=40 | Pos. | width=165 | Country | width=80 | Points | width=80 | Matches | width=80 | Sets |
|---|---|---|---|---|---|---|---|---|---|
| 1 |  | 3 - 0 | 6 - 3 | 13 - 8 | |||||
| 2 |  | 1 - 2 | 5 - 3 | 11 - 7 | |||||
| 3 |  | 1 - 2 | 4 - 5 | 10 - 11 | |||||
| 4 |  | 1 - 2 | 3 - 6 | 7 - 13 | |||||
| width=40 | Pos. | width=165 | Country | width=80 | Points | width=80 | Matches | width=80 | Sets |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 3 - 0 | 8 - 1 | 17 - 3 | ||||||
| 2 |  | 2 - 1 | 6 - 3 | 12 - 9 | |||||
| 3 | 1 - 2 | 4 - 5 | 9 - 13 | ||||||
| 4 |  | 0 - 3 | 0 - 9 | 4 - 17 | |||||