Tuna Altuna (born 30 January 1989 in Istanbul) is a Turkish tennis player.
Altuna has a career high ATP singles ranking of 651 achieved on 9 September 2013. He also has a career high ATP doubles ranking of 355 achieved on 28 December 2015. In February 2016 he entered the doubles main draw of the inaugural ATP Garanti Koza Sofia Open in Sofia, Bulgaria. Alongside Konstantin Kravchuk, they lost in the quarterfinals against Philipp Oswald and Adil Shamasdin.
Playing for Turkey in Davis Cup, Altuna has a W/L record of 1–1.
ATP career finals
Doubles: 1 (1 runner-up)
| Legend |
|---|
| Grand Slam Tournaments (0–0) | | ATP World Tour Finals (0–0) | | ATP World Tour Masters 1000 (0–0) | | ATP World Tour 500 Series (0–0) | | ATP World Tour 250 Series (0–1) |
| | Finals by Surface |
|---|
| Hard (0–0) | | Clay (0–1) | | Grass (0–0) | | Carpet (0–0) |
|
| Outcome | No. | Date | Tournament | Surface | Partner | Opponents | Score |
|---|
| Runner-up | 1. | 7 May 2017 | Istanbul Open, Istanbul, Turkey | Clay | Alessandro Motti | Roman Jebavý
Jiří Veselý | 0–6, 0–6 |