2017 Croatia Open Umag

The 2017 Croatia Open Umag (also known as the Plava Laguna Croatia Open Umag for sponsorship reasons) was a men's tennis tournament played on outdoor clay courts. It was the 28th edition of the Croatia Open, and part of the ATP World Tour 250 Series of the 2017 ATP World Tour. It took place at the International Tennis Center in Umag, Croatia, from 17 July through 23 July 2017.

Seeds

 * 1 Rankings are as of July 3, 2017

Other entrants
The following players received wildcards into the singles main draw:
 * Ivan Dodig
 * 🇧🇪 David Goffin
 * 🇦🇺 Marc Polmans

The following players received entry from the qualifying draw:
 * 🇭🇺 Attila Balázs
 * 🇫🇷 Kenny de Schepper
 * 🇦🇷 Marco Trungelliti
 * 🇷🇸 Miljan Zekić

The following player received entry as a lucky loser:
 * 🇷🇺 Andrey Rublev

Withdrawals

 * Before the tournament
 * Borna Ćorić →replaced by 🇷🇺 Andrey Rublev
 * 🇦🇹 Andreas Haider-Maurer →replaced by 🇮🇹 Alessandro Giannessi
 * 🇸🇰 Martin Kližan →replaced by 🇸🇰 Andrej Martin
 * 🇩🇪 Philipp Kohlschreiber →replaced by 🇮🇹 Marco Cecchinato
 * 🇯🇵 Yūichi Sugita →replaced by 🇸🇰 Norbert Gombos

Seeds

 * Rankings are as of July 3, 2017

Other entrants
The following pairs received wildcards into the doubles main draw:
 * Borna Ćorić / Nino Serdarušić
 * Marin Draganja / Tomislav Draganja

Withdrawals

 * Before the tournament
 * Borna Ćorić
 * João Sousa

Singles

 * 🇷🇺 Andrey Rublev defeated 🇮🇹 Paolo Lorenzi, 6–4, 6–2

Doubles

 * 🇦🇷 Guillermo Durán / 🇦🇷 Andrés Molteni defeated Marin Draganja /  Tomislav Draganja, 6–3, 6–7(4–7), [10–6]