Gary Neville believes Ronaldo's return to Manchester United can propel the club into real title contenders.
The five-time Ballon d'Or winner is set to rejoin the club, it was confirmed today.
Reacting to the news on Sky Sports, Neville said it is a major boost for the club.
The pair played together during Ronaldo's first stint at Old Trafford between 2003 and 2009.
"This news gives me more hope that Manchester United could have a great season and what it does give every Manchester United fan is a great feeling," he said.
"This is one of the most special players that has ever lived, that has ever played the game of football, forget Manchester United, this is one of the greats of all time and we're seeing him in the Premier League, so it makes the Premier League so much more exciting this season."
Attention will inevitably turn quickly to how Ronaldo will fit into Ole Gunnar Solskjaer's plans.
Neville believes he will play in a number nine role.
"He'll play regularly, he'll play as a number nine, he'll play as a centre forward and I'm sure they'll put legs in around him. He will score goals.
"Cristiano Ronaldo will be coming to win trophies, win personal accolades, set the Premier League on fire. It is a different Cristiano Ronaldo, everyone accepts that, but he is a number nine, he's a centre forward, he's someone who has that burst of speed over short spaces that will cause problems.
"He makes great runs inside the box, he has anticipation of where the ball is going to drop so I think in terms of what he gives to Manchester United, he gives them something at this moment of time they need.
"I thought Man Utd should be in for Kane if he's available, in for Haaland these types of players to get above Manchester City and Liverpool and Chelsea they're going to have to do something big.
"This could give them a temper shot in the arm that would potentially get them right up there this year."
Ronaldo's second debut for the club could come on September 11th, with United set to have a home fixture against Newcastle.
