Micheál Donoghue said Galway had to shake off some rustiness before clicking into gear against Dublin.
The Allianz League champions pulled away in the second half for a comfortable 14-point victory after only leading by three at the break.
"Delighted to be up and running and happy with the result," the Galway manager remarked.
"Starting off, I thought we were a small bit rusty. We went six up before half-time, they got the goal to bring it back to three before half-time, so we had to kick on again. When they were reduced to 14 it opened it up for us. It was easy enough to pick off a few scores after that."
He continued: "The league was a chapter closed. the championship was always going to be something different. We said right throughout the league this was our main focus."
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