2015 Croatia Open Umag

The 2015 Croatia Open Umag (also known as the Konzum Croatia Open Umag for sponsorship reasons) was a men's tennis tournament played on outdoor clay courts. It was the 26th edition of the Croatia Open, and part of the ATP World Tour 250 Series of the 2015 ATP World Tour. It took place at the International Tennis Center in Umag, Croatia, from 20 July through 26 July 2015.

Seeds

 * 1 Rankings are as of July 13, 2015

Other entrants
The following players received wildcards into the singles main draw:
 * Toni Androić
 * Mate Delić
 * 🇷🇺 Andrey Rublev

The following players received entry from the qualifying draw:
 * 🇷🇸 Laslo Djere
 * 🇮🇹 Thomas Fabbiano
 * 🇮🇹 Matteo Trevisan
 * 🇦🇹 Bastian Trinker

Withdrawals

 * Before the tournament
 * 🇪🇸 Pablo Andújar →replaced by Damir Džumhur

Retirements

 * 🇦🇹 Andreas Haider-Maurer
 * 🇷🇸 Dušan Lajović

Seeds

 * Rankings are as of July 13, 2015

Other entrants
The following pairs received wildcards into the doubles main draw:
 * 🇫🇷 Paterne Mamata / 🇫🇷 Gaël Monfils
 * Dino Marcan / Antonio Šančić

Singles

 * 🇦🇹 Dominic Thiem defeated João Sousa, 6–4, 6–1

Doubles

 * 🇦🇷 Máximo González / 🇧🇷 André Sá defeated 🇵🇱 Mariusz Fyrstenberg / 🇲🇽 Santiago González, 4–6, 6–3, [10–5]