In addition to RK Zagreb, 39 other teams from 9 different countries played in Boys 11. They were divided into 6 different groups, whereof RK Zagreb could be found in Group 5 together with Vorup FB, Kärra HF 1, Norrköpings HK, IK Sävehof 3, Önnereds HK 2 and Dong Xing. RK Zagreb made it to A-Play-off after reaching 2:nd place in Group 5. Once in the playoff they made it all the way to the Final, but lost it against El-Shams SC with 11-12. Thereby RK Zagreb finished second in B11 A-Play-off during Partille Cup 2013.