2015 Tilia Slovenia Open – Singles

Blaž Kavčič was the defending champion, but chose not to compete.

Luca Vanni won the tournament, defeating Grega Žemlja in the final, 6–3, 7–6(8–6).

Seeds

 * 1) 🇪🇸 Marcel Granollers (first round)
 * 2) 🇮🇹 Paolo Lorenzi (quarterfinals)
 * 3) 🇧🇪 Kimmer Coppejans (first round)
 * 4) 🇸🇰 Lukáš Lacko (second round)
 * 5) 🇸🇰 Norbert Gombos (semifinals)
 * 6) 🇮🇹 Luca Vanni (champion)
 * 7)  Thiemo de Bakker (second round)
 * 8) 🇧🇦 Mirza Bašić (quarterfinals)