"He came as a kid and left as the best player in the world!" Ferdinand on Ronaldo impact at Man Utd

In a fascinating listen, Rio Ferdinand talks about the evolution of Cristiano Ronaldo at Manchester United, and how a training ground incident with Ruud van Nistelrooy helped to change his game. Hit 'Subscribe' above to ensure you never miss a video from the BT Sport YouTube channel. Click here to purchase a BT Sport Monthly Pass - http://bit.ly/BTSportMonthlyPass Visit and subscribe to our 'BT Sport Boxing' YouTube channel ➡️ http://www.youtube.com/c/btsportboxing Twitter: http://twitter.com/btsport Facebook: http://www.facebook.com/btsport Instagram:http://instagram.com/btsport Website: http://sport.bt.com