Croatia were not the favourites to reach the last four again but they came through two penalty shootouts in a repeat of their 2018 exploits.
"They have troubled many national teams. I won't mention the key players or their strengths and weaknesses but we've analysed where we can hurt them. Sometimes it works out, sometimes it doesn't," coach Lionel Scaloni said on the eve of the first semi-final.
"We try to give it all on the pitch. Sometimes luck can be on your side. If we have a good performance, we'll have an easier road to reach our objective. But this is football, this is sport, so sometimes the best team may not win."
When pressed on Croatia's veteran midfielder Luka Modric, who is still going strong at the age of 37, Scaloni said it was a pleasure to watch him play.
"He's a role model for so many of us - not just because of his talent but also his behaviour," Scaloni said.
"All I can say is we should enjoy him. If you love football then you should enjoy players like him."
Scaloni said both Angel Di Maria and Rodrigo De Paul would be fit and missing the suspended Marcos Acuna and Gonzalo Montiel would not be a problem.
"We have our own system, our style. Of course, in certain situations we need to take into account how the opponents are playing," Scaloni said.
"We won't change our style beyond the system and that's what we're going to do. During the game we will of course make decisions (based on situations) and rise up to the challenge."