| 2018 Nielsen Pro Tennis Championship | |
|---|---|
| Date | 9–14 July |
| Edition | 27th |
| Surface | Hard |
| Location | Winnetka, United States |
| Champions | |
| Singles | |
 Evgeny Karlovskiy | |
| Doubles | |
 Austin Krajicek /  Jeevan Nedunchezhiyan | |
The 2018 Nielsen Pro Tennis Championship was a professional tennis tournament played on hard courts. It was the 27th edition of the tournament which was part of the 2018 ATP Challenger Tour. It took place in Winnetka, Illinois, between 9 and 14 July 2018.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| USA | Tim Smyczek | 113 | 1 |
| USA | Bjorn Fratangelo | 129 | 2 |
| IND | Ramkumar Ramanathan | 140 | 3 |
 TPE | Jason Jung | 155 | 4 |
 BAR | Darian King | 160 | 5 |
| USA | Reilly Opelka | 161 | 6 |
| USA | Kevin King | 172 | 7 |
 EGY | Mohamed Safwat | 175 | 8 |
The following players received wildcards into the singles main draw:
Tom Fawcett Martin Joyce Thai-Son Kwiatkowski Danny Thomas The following players received entry into the singles main draw using protected rankings:
Tom Jomby Nicolas Meister The following players received entry from the qualifying draw:
Evgeny Karlovskiy def. Jason Jung 6–3, 6–2. Austin Krajicek / Jeevan Nedunchezhiyan def. 
Roberto Maytín / 
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