The 2015 Istanbul Open (also known as the TEB BNP Paribas Istanbul Open for sponsorship purposes) was a men's tennis tournament played on outdoor clay courts. It was part of the 2015 ATP World Tour. It was the first edition of the Istanbul Open, and an ATP World Tour 250 event. It took place at the Koza World of Sports Arena in Istanbul, Turkey, from 27 April through 3 May 2015. First-seeded Roger Federer won the singles title.
See main article: 2015 Istanbul Open – Singles. Roger Federer defeated Pablo Cuevas, 6–3, 7–6(13–11)
See main article: 2015 Istanbul Open – Doubles. 
Radu Albot / 
Dušan Lajović defeated 
Robert Lindstedt / 
Jürgen Melzer, 6–4, 7–6(7–2)
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Roger Federer | 2 | 1 | ||
| Grigor Dimitrov | 11 | 2 | ||
| Pablo Cuevas | 23 | 3 | ||
 Colombia | Santiago Giraldo | 31 | 4 | |
| Austria | Andreas Haider-Maurer | 47 | 5 | |
 Kazakhstan | Mikhail Kukushkin | 54 | 6 | |
 Russian Federation | Mikhail Youzhny | 57 | 7 | |
 Argentina | Diego Schwartzman | 61 | 8 |
The following players received wildcards into the main draw:
The following players received entry via the qualifying draw:
Paolo Lorenzi →replaced by Ivan Dodig Juan Mónaco →replaced by Daniel Gimeno-Traver| Country | Player | Country | Player | Rank1 | Seed | |
|---|---|---|---|---|---|---|
| Sweden | Robert Lindstedt | Austria | Jürgen Melzer | 69 | 1 | |
| Austria | Oliver Marach | Austria | Philipp Oswald | 98 | 2 | |
 Australia | Chris Guccione |  Brazil | André Sá | 100 | 3 | |
| Mate Pavić |  New Zealand | Michael Venus | 124 | 4 |
The following pair received wildcards into the doubles main draw:
The following pair received entry as alternates:
