"If you are going to meet with (Russian President Vladimir) Putin, and I met with him last week and he asked me to say hello, so of course he is waiting for your visit," de Sousa said.

"If you travel to Russia during the World Cup, remember that Portugal are still there and want to win the tournament.".

Earlier in June, Putin said that he would be glad to welcome all guests at the World cup including those of the highest level from the United States.

On Wednesday, Trump said that his first meeting with Putin in a while could take place after a NATO summit, which is set to take place between July 11 and July 12, while the World Cup final will be played in Moscow on July 15.

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.