Unlike Europe, where Messi spent 19 years, the MLS Cup isn't decided by league play. The playoffs determine the champion. Messi admitted he's getting used to that reality, which is otherwise common across American sports.
"I think the playoffs are a completely different competition, where the games are different," he said. "The teams are much more careful and attentive to every detail as with any given situation you can be knocked out. But obviously we're prepared to fight and try to win it, what we all want."
In four MLS postseason appearances, Messi has three goals and two assists.