Portugal coach Fernando Santos has offered his support to Cristiano Ronaldo in the wake of a rape allegation made against the player.

The Juventus forward, who has scored 85 times in 154 appearances for his country, has been left out of the Portugal squad for the October internationals against Poland and Scotland, and Santos said an agreement has been reached for him not to return to international duty until 2019.

Ronaldo was also rested for his country's matches against Croatia and Italy in September. On Wednesday, the 33-year-old issued a strong denial over allegations he sexually assaulted a woman in the United States in 2009.

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Santos, quoted on the website of Portuguese sports newspaper O Jogo, said: "I personally always support my players and here it is not even a question of solidarity, I believe what the player said publicly, he considers [rape] an abject act and clearly reaffirms that he is innocent of what he is being accused of.

"There was a conversation with the player, the president of the federation [Fernando Gomes] and I. We agreed that the player would not be in these two call-ups, this and the next one in November."

He added on the national team's Twitter feed: "In the future, nothing prevents Cristiano from giving his contribution to the national team."

Juventus' Cristiano Ronaldo in the stands (REUTERS)

Ronaldo is being sued by a woman in the US, who claims he assaulted her in the penthouse suite of a Las Vegas hotel.

She also alleges the former Manchester United player dispatched a team of "fixers" to obstruct the criminal investigation and trick her into keeping quiet for 375,000 US dollars (£268,000).

Ronaldo has firmly denied the allegations, saying it "goes against everything that I am and believe in".

Speaking to reporters in Nevada on Wednesday, lawyer Leslie Stovall said the woman suffers depression and post-traumatic stress linked to the alleged incident, but was encouraged to launch legal action after seeing others do the same as part of the #MeToo movement.

Portugal will play Poland in the Nations League before a friendly against Scotland in Glasgow on October 14.

Among Portugal's forwards for the international double-header are Eder, who scored the winner in the Euro 2016 final against France, and Wolves' Helder Costa who receives a first senior call-up.

"Eder was always being observed and this time we felt he should be called up," Santos added. "The players are very motivated to play these matches for the national team.