Eto'o declared he was ready to quit the club in the summer after another trophyless season, but later backed down from the comments.
Asked about Eto'o's blast, Messi said: "Samuel is a winner and wants to win titles, like everyone in the squad.
"But now is not the time to discuss such issues. I can tell you the entire dressing room is united and we're all focused on the game against Manchester United."