Nielsen Pro Tennis Championship
| Nielsen Pro Tennis Championship | |
|---|---|
| Defunct tennis tournament | |
| 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 was a tennis tournament held intermittently in Winnetka, Illinois, USA from 1984 until 2019. The event was part of the ATP Challenger Tour and was played on outdoor hardcourts at the A. C. Nielsen Tennis Center, a facility owned and operated by the Winnetka Park District.