Kammala jumla mai zuwa: Tare da kwallon kafa ya zama babban wasanni na Daular Ottoman a kusa da 1910, membobin Beşiktaş sannu a hankali sun fara ba da hankali ga kwallon kafa. A watan Agusta 1911, Ahmed Şerafettin ya fara ƙungiyar ƙwallon ƙafa. Tare da barkewar Yaƙin Duniya na I bayan Yaƙe-yaƙe na Balkan, ayyukan wasanni a kulob din sun tsaya yadda ya kamata yayin da 'yan wasa da yawa suka tafi don yin aiki a layin gaba. Yayin da karshen yakin ya ba da damar 'yan wasan da suka tsira su dawo, kungiyar ta fuskanci mawuyacin lokaci a lokacin yakin basasa.
A lokacin mamayar Istanbul, amma ya sami damar murmurewa tare da aiki mai wuyar gaske na Şeref Bey. Beşiktaş bai shiga wasannin Juma'a da Lahadi na Istanbul ba, kuma ba su da wata gasar zakarun Turai har zuwa 1918, lokacin da suka lashe gasar wasannin motsa jiki ta farko ta Istanbul.