Kammala jumla mai zuwa: A ranar 24 ga Yuli, 1580, António ya ayyana kansa Sarkin Fotigal a Santarém, wanda ya biyo baya a wurare da yawa a duk faɗin ƙasar; gwamnatinsa ta gida ta ɗauki kwanaki 20, har sai da aka ci shi a cikin
Yaƙin Alcântara ta sojojin Habsburg da Duke na Alba ya jagoranta. Bayan faduwar Lisbon, ya yi ikirarin mulkin kasar daga tsibirin Terceira, a cikin Azores, inda ya kafa gwamnatin da ke gudun hijira har zuwa 1583; António har ma yana da tsabar kudi da aka buga - wani nau'in tabbatar da ikon mallaka da sarauta. Wasu marubutan suna ɗaukarsa a matsayin sarki na ƙarshe na gidan Aviz (maimakon Cardinal-King Henry) da kuma Sarki na 18 na Fotigal. Gwamnatinsa a tsibirin Terceira an yarda da ita ne kawai a cikin Azores, yayin da a kan babban yankin da tsibirin Madeira ikon Philip II ne, wanda aka yaba da shi a matsayin sarki a 1580 a matsayin Philip I na Fotigal kuma Cortes na Tomar ya gane shi a matsayin sarki na hukuma a 1581. An gudanar da zaɓen sabon sarki a kan yanayin cewa masarautar da yankunanta na ƙetare ya kamata su kasance daban da Spain kuma su kiyaye dokokinsu da Cortes.