| 2003 TD Waterhouse Cup | |
|---|---|
| Date | August 18–24 |
| Edition | 23rd |
| Category | International Series |
| Draw | 32S / 16D |
| Prize money | $355,000 |
| Surface | Hard / outdoor |
| Venue | Jericho, New York, United States |
| Champions | |
| Singles | |
 Paradorn Srichaphan [1] | |
| Doubles | |
 Robbie Koenig /  Martín Rodríguez [2] | |
The 2003 TD Waterhouse Cup was a men's tennis tournament played on outdoor hard courts at the Hamlet Golf and Country Club in Jericho, New York in the United States and was part of the International Series of the 2003 ATP Tour. The tournament ran from August 18 through August 24, 2003. First-seeded Paradorn Srichaphan won his second consecutive singles title at the event. [3]
