Nike 'deeply concerned' and Juventus shares drop amid Ronaldo rape

US sportswear giant Nike says it is "deeply concerned" by rape allegations against Cristiano Ronaldo and shares in Italian champions Juventus fell over five percent on the Italian stock exchange on Friday.

Ronaldo's coach at Juventus, Massimiliano Allegri, said the striker is "doing well" and is "ready to play" when the Turin giants travel to Udinese in Serie A on Saturday.

But the player's relationship with Nike, which is rumoured to be worth $1 billion dollars (869 million euros), is under scrutiny after police in Las Vegas announced this week they were reopening an investigation into allegations made by a former model, Kathryn Mayorga, relating to an incident in 2009.

"We are deeply concerned by the disturbing allegations and will continue to closely monitor the situation," a Nike spokesman told AFP.

According to Forbes magazine, Ronaldo is one of only three athletes to have been given a lifetime deal with Nike, joining an elite club that also includes NBA icons LeBron James and Michael Jordan.

EA Sports, for whom Ronaldo is a leading figure in their phenomenally successful FIFA video game market, also described the allegations as "concerning".

"We are closely monitoring the situation, as we expect cover athletes and ambassadors to conduct themselves in a manner that is consistent with EA's values," the group said in a statement.

- Juventus reaction criticised -
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"The events allegedly dating back to almost 10 years ago do not change this opinion, which is shared by anyone who has come into contact with this great champion."
Asked about the allegations, Santos said. "I know Cristiano Ronaldo very well and I fully believe his word when he says he would never commit a crime like this."