The host nation will face Saudi Arabia, Egypt and Uruguay in Group A.

"If someone wants to say that we will beat these teams hands down, it's not true. Now everyone is training and playing. It won't be easy for us! We should be prepared for the World Cup as much as possible," Rausch said.

The defender added that it was fine that players were worrying about the upcoming tournament.

"[We] need to feel it to prepare the best way we can," he said.

 Russia's first-ever FIFA World Cup will take place from June 14 to July 15 at 12 venues in 11 host cities.