Ahead of that fixture in Nizhny Novgorod, Dalic said his team have an incredibly difficult task ahead of them.
"Messi is the best payer in the world, [it's] not possible to stop him," Dalic told Goal.
"[We] have to stop the ball [from getting] to him because when he receives the ball, it's very very difficult to stop him."
Croatia have failed to advance past the group phase of a World Cup since finishing third at the 1998 competition in France.
Following group-stage eliminations in 2002, 2006 and 2014, Dalic has a very clear mission for his side in Russia.
"Our first goal is to pass the group stage," the 51-year-old said. "[It's] most important for me to go to the round of 16. After [that it] will be easy for us."