Croatia have one foot in the World Cup after a dominating 4-1 win over Greece in the first leg of their European World Cup qualifying play-off, but Zlatko Dalic and his side know the job isn't done yet.
Goals from Luka Modric, Nikola Kalinic, Ivan Perisic and Andrej Kramaric made sure the home side will take a three-goal advantage to Athens after a poor defensive showing from Greece.
But the large lead should not be taken for granted, according to the Croatian boss.
"No euphoria, we have to play in Athens as if it is 0-0," Dalic said after the match. "These guys are all top players, they don't need much, we just needed some talks, some change of positions, support, and to give them back joy and confidence."
Real Madrid midfielder Modric echoed his manager and wants his side to stay on the front foot in the second leg.
"This was one of my biggest matches in national team," he said. "Big victory, but 4-1 can be tricky if we do not play like this in Athens too.
"We must not defend there."
Barcelona star Ivan Rakitic also made it clear that he's not expecting an easy ride, having traveled to play in Athens at the club level.
"This was the best Croatian game in the last years, but there is hell waiting for us in Athens," he said. "I know, I've played for Barcelona vs Olympiakos."