| 2009 Nielsen Pro Tennis Championship | |
|---|---|
| Date | June 29 – July 5 |
| Edition | 18th |
| Surface | Hard |
| Location | Winnetka, Illinois, United States |
| Champions | |
| Singles | |
 Alex Kuznetsov | |
| Doubles | |
 Carsten Ball / Travis Rettenmaier | |
The 2009 Nielsen Pro Tennis Championship was a professional tennis tournament played on outdoor hard courts. It was the 18th edition of the tournament which was part of the 2009 ATP Challenger Tour. It took place in Winnetka, Illinois, between 29 June and 5 July 2009.
| Nationality | Player | Ranking* | Seeding |
|---|---|---|---|
| USA | John Isner | 97 | 1 |
| USA | Vince Spadea | 113 | 2 |
| USA | Brendan Evans | 138 | 3 |
| USA | Donald Young | 159 | 4 |
| USA | Rajeev Ram | 160 | 5 |
 GER | Simon Stadler | 161 | 6 |
| USA | Ryan Sweeting | 164 | 7 |
 ITA | Andrea Stoppini | 177 | 8 |
The following players received wildcards into the singles main draw:
Alex Bogomolov Jr. Samuel Groth Dennis Nevolo Phillip Simmonds The following players received entry from the qualifying draw:
Alex Kuznetsov def. Tim Smyczek, 6–4, 7–6(1)
Carsten Ball / Travis Rettenmaier def. Brett Joelson / Ryan Sweeting, 6–1, 6–2
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