Reigning European champions Portugal and the 2010 World Cup winners Spain played our a classic in Sochi on Friday, which ended in a 3-3 draw, with Portugal captain Cristiano Ronaldo scoring a hat-trick.

“We watched the opening game [between Russia and Saudi Arabia], it was great. I think it cheered up everyone in Russia. Yesterday, we watched the match between Spain and Portugal, it was a really good match between two very good teams, who each scored three goals. It was a real game between champions,” Low told journalists.

Low also said that all his players were ready for their first match of the tournament against Mexico on Sunday, while Mesut Ozil is in contention after recovering from a minor knee injury he picked up during Germany's 2-1 defeat against Austria in a friendly on June 2.

"All our players are ready and are in good shape. Mesut Ozil is also ready," the head coach said.

Defending champions Germany will play their first World Cup match against Mexico at the Luzhniki Stadium in Moscow on Sunday before taking on their two other Group F rivals, Sweden and South Korea.

The games of the 2018 FIFA World Cup will be held at 12 stadiums across 11 Russian cities till July 15.