Whakaotihia te rerenga e whai ake nei: I te marama o Akuhata 2015, i tohua a Frederiksen hei kaiwhakahaere mo te kapa Denmark i raro i te 21, me te hainatanga i tetahi kirimana e rua tau. I tana tukinga tuatahi i te kawenga, i ngaro ratou 1<unk>2 ki Tiamana i te hoa i te Stadion Lohmühle i Lübeck, Schleswig-Holstein. I raro i a Frederiksen, i tohu a Denmark mo te UEFA European Under-21 Championship i te tau
2017 me te 2019, i reira i patua ai ratou i roto i nga waahanga roopu, ka mutu te tuatoru me te tuarua, i runga ake nei.