The Ballon d'Or holder will travel to his old stomping ground to lead Portugal out in an anticipated friendly against Argentina on November 18. It is reported that Manchester United have agreed to allow the Portuguese to use the facilities and will train alongside the non-international players.
For Ronaldo, it will be the first time he has stepped through the doors of Carrington since sealing an £80 million transfer to Real Madrid. He has played at Old Trafford in March 2013, helping to knock Sir Alex Ferguson's men out of the Champions League by scoring in a second round match.
The return of the king
Ronaldo's return to Manchester will not be about ceremony. The Red Devils have been heavily linked with a move for the 29-year-old in recent months and it is believed Old Trafford officials scrutinised the finances surrounding the deal.
They decided that a deal to bring Ronaldo back would cost the club too much money. Real Madrid were reportedly demanding £60 million for the star forward while Ronaldo's wage demands were expected to be greater than his current £300,000-a-week package.
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As Ronaldo is approaching 30-years-old, it is unlikely that they will get any resale value from the deal and now there is more momentum around a potential deal for Gareth Bale.
Ronaldo's presence will likely drum up a media circus, hoping to take advantage of the situation to rehash old links. Van Gaal will not be oblivious to the situation, but is understood to be calm at the prospect of having Ronaldo back at the club.
Ronaldo will be just part of the interest for Manchester United fans, who will also benefit from seeing Angel di Maria play for his national side. Marcos Rojo was expected to be part of the squad, but has been ruled out for six weeks with a dislocated shoulder.
Argentina are still negotiating terms with local rivals Manchester City in an attempt to occupy the newly-opened Etihad Campus training facility located next to the Etihad Stadium.