Reigning champions Germany, who thrashed Brazil 7-1 in the semi-final of the 2014 FIFA World Cup, will face Mexico at Moscow's 81,000-seater Luzhniki Stadium on Sunday.

"I don't dream of this, I'm a realist. We won the semi-final with a 7-1 score, this happens once in a lifetime. It was a wonderful day... but I don't think this will happen again. The most important thing is to win the semi-final, the score doesn't matter," Low told journalists when he was asked if Germany could repeat their 2014 World Cup result.

He added that all the top-level teams, including Brazil, France and Spain, have become stronger since 2014.

"We must admit the strong points of the other teams... We must think what we need to improve," Low said.

The 2018 FIFA World Cup will last till July 15, with the games set to be played at 12 stadiums across 11 Russian cities.  Germany will also play Sweden in Sochi on June 23 and South Korea in Kazan on June 27 in as a part of Group F.