The first competition of the 2021 season, the WSK Champions Cup allowed Birel ART Racing to debut it's team on the Adria Karting Raceway in the presence of a record number of participants. In Mini, the largest category, Van Langendonk did very well to reach 6th position in the Final. Spirgel showed excellent competitiveness in the Junior class, and Kucharczyk adapted perfectly to the OK category, as did Thanapongpan in KZ2.