2018 Diema Xtra Sofia Open – Doubles

Viktor Troicki and Nenad Zimonjić were the defending champions, but lost in the first round to Robin Haase and Matwé Middelkoop.

Haase and Middelkoop went on to win the title, defeating Nikola Mektić and Alexander Peya in the final, 5–7, 6–4, [10–4].

Seeds
• # 🇵🇱 Marcin Matkowski / 🇵🇰 Aisam-ul-Haq Qureshi (first round)

• # Nikola Mektić / 🇦🇹 Alexander Peya (final)

• # 🇺🇸 Nicholas Monroe / 🇦🇺 John-Patrick Smith (semifinals)

• # Robin Haase /  Matwé Middelkoop (champions)