Rubuta ci gaba don wannan sakin layi - A watan Agusta 2015, an nada Frederiksen manajan kungiyar Denmark ta 'yan kasa da shekaru 21, inda ya sanya hannu kan kwantiragin shekara biyu. A wasan farko da ya yi, sun yi rashin nasara 1<unk>2 ga Jamus a wasan sada zumunta a Stadion Lohmühle a Lübeck, Schleswig-Holstein. A karkashin Frederiksen, Denmark ta cancanci zuwa gasar zakarun Turai ta UEFA a shekara ta 2017
da 2019, inda aka fitar da su a matakin rukuni, inda suka zama na uku da na biyu, bi da bi.