Why Cristiano Ronaldo's legacy could be best protected at Manchester United

Cristiano Ronaldo has been open in his ambition to move on from Manchester United and take up a new challenge. It comes after Ronaldo did not report for pre-season training at the club's Carrington training complex three weeks ago and has been absent from their tour of Thailand and Australia due to a family issue.

Two days before United's internationals' scheduled return date for training, it emerged that the Portuguese superstar wished to leave the club over their failure to qualify for the Champions League and slow movement in the transfer market.

Since then, though, United have gone on to make three first-team signings - signings that many would agree improve United's squad in different departments with Tyrell Malacia, Christian Eriksen and Lisandro Martinez. We know United aren't done yet, too, with the Frenkie de Jong saga ongoing, taking twists and turns seemingly every day.

ALSO READ: 'I only scored 10 goals and people start complaining' - Fernandes defends role

Yet Ronaldo’s future has been a constant source of speculation over the past few weeks, with the player himself seemingly still keen to move on. At this point in his career, what does Ronaldo have left to prove? The answer is very little.

Starting the debate of who the greatest player of all-time is one that is quite pointless - it's all down to opinion. But honestly, you could make a really strong case for around four to five players to be in that list. Cristiano Ronaldo is one of those five players.

His resume speaks for himself. At United, he was one of the main men who helped deliver three consecutive Premier League titles as well as winning a Champions League with the Reds.

After getting his move to his dream club, Real Madrid, Ronaldo elevated