| Nielsen Pro Tennis Championship | |
|---|---|
| ATP Challenger Tour | |
| Event name | Winnetka |
| Location | Winnetka, Illinois, USA |
| Venue | A. C. Nielsen Tennis Center (a facility of the Winnetka Park District) |
| Category | ATP Challenger Tour |
| Surface | Hard, outdoors |
| Draw | 32S/4Q/16D |
| Prize money | $75,000 |
The Nielsen Pro Tennis Championship is a tennis tournament held intermittently in Winnetka, Illinois, USA since 1984. The event is part of the ATP Challenger Tour and is played on outdoor hard courts at the A. C. Nielsen Tennis Center, a facility owned and operated by the Winnetka Park District.