Portugal held its first training session in Russia on Sunday in preparation for the 2018 FIFA World Cup, with superstar Cristiano Ronaldo appearing out of sorts amid adverse weather conditions. Also Read - 'I Am Back' - Gareth Bale Returns to Tottenham Hotspur on Season-Long Loan Deal From Real Madrid

Ronaldo, whose future at Real Madrid is still in doubt, got off to a nervy start, and during the half-field practice match even kicked the ball over the stands in apparent frustration after committing an error. Also Read - Juventus Star Cristiano Ronaldo Wins IFFHS World's Best International Top-Scorer Trophy

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The training was marked by rain and unusually low temperatures for this time of year, even in the Russian capital, at about 10C (50F).

The session lasted for more than an hour before 200 to 300 fans in the Russian town of Kratovo, some 25 kilometers (15 miles) southeast of Moscow.

The Portuguese press reported that the national team is to remain in the outskirts of Moscow until June 14, when it will leave for Sochi to start the 2018 World Cup with a match against Spain on June 15.

Portugal will be looking to emulate their EURO 2016 heroics, where they defeated France in the finals as underdogs to become the champions of Europe.

Ronaldo, who has all the individual and club accolades to his name is still longing to get his hands on the 18-carat-gold trophy, the grandest prize in the game.

Recently, the Real Madrid forward won his fifth Champions League trophy of his career ( 1 with Manchester United, 4 with Real Madrid) and will now look to have a great run at the World Cup.

Portugal is to compete in Group B along with Spain, Iran and Morocco.