The Catalan club brushed past the Scottish champions in Dublin on Sunday as the International Champions Cup continues, with Arda Turan and Leigh Griffiths among the scorers.
Lionel Messi and Luis Suarez both started for Barcelona as they beat Celtic in their International Champions Cup encounter on Sunday, though it was Aleix Vidal and Arda Turan who stood out for the Spanish champion.
The midfield pairing linked for the first goal, the former nutmegging his opposing defender, leading to the latter sweeping a 20-yard strike into Craig Gordon's net from the subsequent pass.
A heavy first touch from Martinez allowed Celtic forward Leigh Griffiths to level the game, before Efe Ambrose gifted Barca the lead with an own goal.