Rubuta ci gaba don wannan sakin layi - Mathurin ya taka leda a Kanada a 2021 FIBA Under-19 World Cup
a Riga da Daugavpils, Latvia bayan an cire shi daga tawagar Olympics. A ranar 4 ga Yuli, 2021, ya zira kwallaye 30 mafi girma, yana harbi 11-na-15 daga filin da 6-na-9 daga maki uku, a cikin nasarar 100<unk>75 a rukunin rukuni a kan Japan. Mako guda bayan haka, Mathurin ya ci maki 31 don jagorantar Kanada zuwa nasara 101<unk>92 akan Serbia a wasan na uku kuma ya lashe lambar tagulla. Ya yi matsakaicin maki 16.1 da rebounds huɗu a kowane wasa a gasar.