Messi struck twice in the 5-1 triumph.
And Genesio remarked afterwards: "When we fail, we always have questions about the game system and team composition. It was the best to cause problems, but we suffered too much in the first half.
"There are no regrets but questions. We knew that a lot depended on Lionel Messi. He went into Champions League mode, and he proved he was one of the best players in the world."