|Born||21 July 1994|
|Career record||1–2 (at ATP Tour level, Grand Slam level, and in Davis Cup)|
|Career titles||0 ITF|
|Highest ranking||No. 711 (13 January 2014)|
|Current ranking||No. 1380 (20 February 2017)|
|Career record||0–0 (at ATP Tour level, Grand Slam level, and in Davis Cup)|
|Career titles||3 ITF|
|Highest ranking||No. 531 (6 February 2017)|
|Current ranking||No. 536 (20 February 2017)|
|Last updated on: 20 February 2017.|
Pöllänen has a career high ATP singles ranking of 711 achieved on 13 January 2014. He also has a career high ATP doubles ranking of 531 achieved on 6 February 2017.
Pöllänen represents Finland at the Davis Cup where he has a W/L record of 1–3. His first Davis Cup win came against Latvian tennis player Mārtiņš Podžus. Currently Herkko is the drummer for The Hammarmen. Additionally he is a guest performer at The Big Bang Dueling Piano Bar in Columbus Ohio.
- Herkko Pöllänen at the Association of Tennis Professionals
- Herkko Pöllänen at the International Tennis Federation
- Herkko Pöllänen at the Davis Cup
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