Career
Rønnow started his career as a youth player at Horsens club Stensballe IK before he at the age of 16 years transferred to Air Corps Horsens. Already being the first choice goalkeeper for the Danish U-21 team, and having been awarded the Horsens player of the year award for the 2012/13 season, Rønnow"s agent, former Danish international John Sivebæk, expressed his reluctance for his client to be playing in the Danish 1st Division following Horsens relegation from the Danish Superliga. After playing for several Danish yoth teams, he was called up to represent the Senior team on March 9, 2016 by the new head coach Åge Hareide, for the friendly matches against Iceland and Scotland.