More than 17 hours after Brazil’s electoral chief declared Luíz Inácio Lula da Silva the winner of the presidential election, defeated incumbent Jair Bolsonaro has yet to concede.
The far-right president is said to have gone to sleep after he narrowly lost to his left-wing arch rival.
His silence is raising concern that he may not accept the result.
He has in the past cast unfounded doubts on the voting system.
Combative statements from Mr Bolsonaro in the past – such as that “only God” could remove him from office – mean there is a tense wait for him to appear in public.