The 2014 Nielsen Pro Tennis Championship was a professional tennis tournament played on hard courts. It was the 23rd edition of the tournament which was part of the 2014 ATP Challenger Tour. It took place in Winnetka, Illinois, between 30 June and 6 July 2014.
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Michael Russell | 94 | 1 | ||
| Tim Smyczek | 106 | 2 | ||
 Russian Federation | Evgeny Donskoy | 114 | 3 | |
 Tunisia | Malek Jaziri | 121 | 4 | |
 Australia | Sam Groth | 124 | 5 | |
 India | Somdev Devvarman | 125 | 6 | |
| Denis Kudla | 136 | 7 | ||
 Lithuania | Ričardas Berankis | 139 | 8 |
The following players received wildcards into the singles main draw:
Marcos Giron Jared Hiltzik Evan King Raymond SarmientoThe following player received entry as a lucky loser into the singles main draw:
The following players received entry from the qualifying draw:
Ronnie Schneider Mackenzie McDonald Dennis Nevolo Eric QuigleySee main article: 2014 Nielsen Pro Tennis Championship – singles.
Denis Kudla def. 
Farrukh Dustov, 6 - 2, 6 - 2See main article: 2014 Nielsen Pro Tennis Championship – doubles.
Thanasi Kokkinakis / Denis Kudla def. Evan King / Raymond Sarmiento, 6 - 2, 7 - 6(7 - 4)