2019 Nielsen Pro Tennis Championship

The 2019 Nielsen Pro Tennis Championship was a professional tennis tournament played on hard courts. It was the 28th edition of the tournament which was part of the 2019 ATP Challenger Tour. It took place in Winnetka, Illinois, between 8 and 14 July 2019.

Seeds

 * 1 Rankings are as of July 1, 2019.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇺🇸 Stefan Dostanic
 * 🇺🇸 Bjorn Fratangelo
 * 🇺🇿 Denis Istomin
 * 🇺🇸 Sam Riffice
 * 🇺🇸 Alex Rybakov

The following player received entry into the singles main draw using a protected ranking:
 * 🇦🇹 Maximilian Neuchrist

The following players received entry into the singles main draw using their ITF World Tennis Ranking:
 * 🇺🇸 Jordi Arconada
 * 🇺🇸 Sekou Bangoura
 * 🇹🇳 Aziz Dougaz
 * Michail Pervolarakis
 * 🇺🇸 Martin Redlicki

The following players received entry from the qualifying draw:
 * 🇺🇸 Felix Corwin
 * 🇺🇸 John McNally

Singles

 * 🇺🇸 Bradley Klahn def. 🇦🇺 Jason Kubler 6–2, 7–5.

Doubles

 * 🇺🇸 JC Aragone / 🇺🇸 Bradley Klahn def. 🇺🇸 Christopher Eubanks / 🇺🇸 Thai-Son Kwiatkowski 7–5, 6–4.