The 2017 Sofia Open (also known as 2017 Garanti Koza Sofia Open for sponsorship reasons) was a men's tennis tournament played on indoor hard courts. It was the second edition of the Sofia Open as part of the ATP World Tour 250 series of the 2017 ATP World Tour. It took place at the Arena Armeec in Sofia, Bulgaria, from 5 February until 12 February 2017. Third-seeded Grigor Dimitrov won the singles title.
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 lucky losers:
The following pairs received wildcards into the doubles main draw: