The Alliance Against the Dictatorship coalition backing Hernandez's chief rival in the poll, Salvador Nasralla, lodged the demand late Friday with the Supreme Electoral Tribunal.
Both Hernandez and Nasralla claimed victory after the November 26 election.
The electoral tribunal has not declared a winner, though the complete results it has released show Hernandez scoring a slender advantage over Nasralla -- despite an initial count putting Nasralla comfortably in the lead.
The small Central American nation of 10 million has been mired in uncertainty since the election, with competing demonstrations for Hernandez and Nasralla.
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