Barca dominated possession in the first period, but could not make a breakthrough against the spirited visitors.
Lionel Messi then made it three for Barca, who are still yet to concede in the league this season.
Read how it all unfolded in Sports Mole's minute-by-minute live commentary of the action below.
Eibar: Irureta; Boveda, Albentosa, Ekiza, Abraham, Lillo; Garcia, Errasti, Capa, Lara; Berjon
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