KFC Zwarte Leeuw was the only club from Belgium that had teams playing during Gothia Cup 2013. They participated with one team in Boys 18. In addition to KFC Zwarte Leeuw, 134 other teams from 26 different countries played in Boys 18. They were divided into 33 different groups, whereof KFC Zwarte Leeuw could be found in Group 12 together with Qviding FIF, Vara SK and FC Rueil Malmaison. KFC Zwarte Leeuw continued to Play off B after reaching 4:th place in Group 12. In the playoff they made it to 1/4 Final, but lost it against Örgryte IS with 0-5. In the Final, Örgryte IS won over FC Rueil Malmaison and became the winner of Play off B in Boys 18. KFC Zwarte Leeuw also participated in Boys 18 during Gothia Cup 2012. They reached the 1/8 Final in B18 Slutspel B, but lost it against Elite Football FC with 0-3. KFC Zwarte Leeuw comes from Rijkevorsel which lies approximately 850 km from Göteborg, where Gothia Cup takes place.