The 2011 Nielsen Pro Tennis Championship was a professional tennis tournament played on hard courts. It was the 20th edition of the tournament which was part of the 2011 ATP Challenger Tour. It took place in Winnetka, Illinois, between June 26 and July 3, 2011.

Country	Player	Rank1	Seed
USA	Michael Russell	90	1
USA	James Blake	102	2
USA	Donald Young	111	3
JPN	Go Soeda	131	4
USA	Bobby Reynolds	138	5
ARG	Brian Dabul	141	6
CHI	Paul Capdeville	142	7
RSA	Rik de Voest	147	8

• ¹ Rankings are as of June 20, 2011.

The following players received wildcards into the singles main draw:

• James Blake
• Robby Ginepri
• Evan King
• Jack Sock

The following players received entry as a special exempt into the singles main draw:

• Pierre-Ludovic Duclos

The following players received entry from the qualifying draw:

• Luka Gregorc
• Bradley Klahn
• Denis Kudla
• Michael Shabaz

James Blake def. Bobby Reynolds, 6–3, 6–1

Treat Conrad Huey / Bobby Reynolds def. Jordan Kerr / Travis Parrott, 7–6^(9–7), 6–4

• Official Website Archived 2011-07-14 at the Wayback Machine
• ITF Search Archived 2010-02-12 at the Wayback Machine
• ATP official site