Mezue ahịrịokwu na-esonụ: N'ọnwa Ọgọstụ 2015, a họpụtara Frederiksen ka ọ bụrụ onye nchịkwa nke ndị otu Denmark n'okpuru 21, na-abịanye aka na nkwekọrịta afọ abụọ. N'egwuregwu mbụ ya, ha meriri 1<unk>2 na Germany na enyi na enyi na Stadion Lohmühle na Lübeck, Schleswig-Holstein. N'okpuru Frederiksen, Denmark tozuru oke maka UEFA European Under-21 Championship na
2017 na 2019, ebe a chụpụrụ ha n'asọmpi otu, wee mechaa nke atọ na nke abụọ, n'otu n'otu.