Portugal coach Fernando Santos opted to pair Goncalo Guedes with Ronaldo from kick-off in the thrilling 3-3 draw with Spain in Sochi, where the captain of the Euro 2016 victor netted a stunning 88th-minute free-kick to deny one of the favourites, which was reeling from the shock sacking of coach Julen Lopetegui on the eve of the tournament.
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Mehdi Benatia forced a smart low save from Rui Patricio at a corner for Morocco, before Hakim Ziyach skipped his way into the Portugal area, his goal-bound effort blocked by an outstretched leg. Can the Real Madrid star do the business again for his country?
Morocco's final game of the group stage is against Spain.
Live Stream: Watch live on fuboTV. However, they failed to complete each of those opportunities and that is where Portugal got there job done early in the game.More news: Merkel, allies avert collision for now in German migrant row
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Pepe, the Portuguese centre-half, was more open about the wonderful first game of his teammate.
The captain also put through Goncalo Guedes before the break only for the forward to shoot directly at Monir El Kajoui.
Morocco failed to convert their chances and are pointless and can not progress to the second round.
One more worldwide goal for the 33-year-old will see him become the highest goalscorer of all time for European nations, and considering the form he is in, this is more than just a possibility.
Morocco, on the other hand, kicked off their first World Cup campaign in two decades with a heartbreaking last-minute defeat to Iran.
Cristiano Ronaldo has become the second leading global goalscorer of all time after finding the back of the net against Morocco.
Renard's team continued to dominate the possession as the match entered its final 15 minutes, but Portugal were remaining strong at the back as they closed on their first win of the tournament.