Cristiano Ronaldo on Man United return: Sir Alex Ferguson 'main key'
Ronaldo to Manchester United: Live transfer updates as Juventus star OKs contract proposal for Man Utd reunion
Cristiano Ronaldo transfer to Manchester United a done deal
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After Ronaldo had helped Portugal qualify for the World Cup with victories over Turkey and North Macedonia at the end of March, he picked up a virus that prevented him from featuring in Man Utd's 1-1 home draw with Leicester.
He has 109 goals for his national team, tied with former Iran striker Ali Daei.
He scored two and assisted one in United's final three games of the year.
He signed a two-year contract with the option to extend for a further year after leaving Juventus.
But many supporters say he will irreversibly damage his reputation and legacy with the Red Devils if he joins their blue rivals.
There is no deep or complicated meaning behind the 'Viva Ronaldo' chant that is sung by Manchester United fans.
While nothing is official quite yet, several excited United players popped up on social media to welcome Ronaldo back home.
If he does move on, Real Madrid would offer an interesting option.