In addition to RK Zagreb, 18 other teams from 5 different countries played in Boys 10. They were divided into 3 different groups, whereof RK Zagreb could be found in Group 1 together with Önnereds HK 2, H 71 1, IK Sävehof 4, Baerums Verk IF and IK Nord. RK Zagreb made it to A-Play-off after reaching 1:st place in Group 1. Once in the playoff they won every match inluding the Final against OV Helsingborg, which they won with 7-3. Thereby RK Zagreb won the entire A-Play-off in Boys 10 during Partille Cup 2013.