"It will depend on how far we go, how we're going to finish" at the finals, Messi said in an interview with Spanish daily Sport.
"We've just lost three finals in a row, which has led to us going through some difficult moments with the press," added the Barcelona forward.
"Notably with the Argentine press because we have differences of opinion over what it means to make these three finals." Argentina lost the 2014 World Cup final 1-0 to Germany after extra time, before suffering successive defeats by Chile on penalties at the Copa America in 2015 and 2016.
"There are lots of teams who arrive with lots of confidence, with both a team game and individual talents," said the five-time world player of the year.