Kalle Koljonen
Kalle Koljonen is a Finnish badminton player. In 2014, he won a bronze medal at the European Men's Team Championships in Basel. In 2015, he became the runner up of Slovenia International and won Hungarian International. In 2016, he became the runner-up of Bulgarian International.
Achievements
BWF International Challenge/Series
Men's singles| Year | Tournament | Opponent | Score | Result |
| 2017 | Dutch International |  Anand Pawar | 22–20, 19–21, 17–21 | Runner-up |
| 2017 | Iceland International | Subhankar Dey | 11–21, 17–21 | Runner-up |
| 2016 | Finnish International |  Victor Svendsen | 7–11, 7–11, 11–8, 12–10, 4–11 | Runner-up |
| 2016 | Norwegian International | Kasper Dinesen | 21–19, 21–13 | Winner |
| 2016 | Bulgaria International | Patrick Bjerregaard | 14–21, 19–21 | Runner-up |
| 2015 | Hungarian International | Rasmus Messerschmidt | 19–21, 21–17, 21–15 | Winner |
| 2015 | Slovenian International |  Dmytro Zavadsky | 21–12, 19–21, 20–22 | Runner-up |