Heikkonen trains out of Espoon Kehahait, where he has a 3 win and 1 loss record. He has been out of MMA action for over a year, as his last bout was at Cage Challenger 3 back in August of 2014 –this was a kneebar win over Juhani Aho. The grappler has not seen a second round in his four fight career, where all the bouts have ended within 5 minutes.
Mattsson will be seeking his 7th win. The run started in 2011 and last saw the GB Gym / Primus Team fighter with a solid win over Niko Myllynen in April at FNF Turku. He has a notable win against Jani Salmi at Cage 22, and followed up that win with a win over Aleksi Mantykivi at Cage 22.