"There will be no damage to the relations regardless of the way the competition ends. On the contrary, sport brings countries and people together and we, as the hosts of the tournament, as the host country, are happy for those who win and we sympathize with those who fail," Putin said.

After beating Egypt 3-1 in their second game of the tournament on Tuesday, Russia are currently top of Group A and are bound to reach the last 16, where they could play Portugal.

"There is a certain problem which may occur if we have to play against each other... Regardless of the result of the match, if it does take place, I hope our diplomatic relations will not be affected," de Sousa said.

The 2018 FIFA World Cup kicked off on June 14 and will continue until July 15, with the matches being played in 11 cities across Russia.