2018 Diema Xtra Sofia Open
The 2018 Sofia Open was a men's tennis tournament played on indoor hard courts. It was the third edition of the Sofia Open as part of the ATP World Tour 250 series of the 2018 ATP World Tour. It took place at the Arena Armeec in Sofia, Bulgaria, from 5 February until 11 February 2018. Unseeded Mirza Bašić, who entered the main draw as a qualifier, won the singles title.
Finals
Singles
- Mirza Bašić defeated Marius Copil, 7–6, 6–7, 6–4
Doubles
- Robin Haase / Matwé Middelkoop defeated Nikola Mektić / Alexander Peya, 5–7, 6–4,
Singles main-draw entrants
Seeds
- 1 Rankings as of January 29, 2018
Other entrants
The following players received wildcards into the singles main draw:The following players received entry from the qualifying draw:
The following players received entry as a lucky loser:
Withdrawals
;Before the tournament- Grigor Dimitrov →replaced by Stan Wawrinka
- Matthew Ebden →replaced by Florian Mayer
- Chung Hyeon →replaced by Blaž Kavčič
- Filip Krajinović →replaced by Marcos Baghdatis
- Mikhail Kukushkin →replaced by Salvatore Caruso
- Lu Yen-hsun →replaced by Malek Jaziri
Doubles main-draw entrants
Seeds
1 Rankings are as of January 29, 2018.Other entrants
The following pairs received wildcards into the doubles main draw:The following pair received entry as alternates: