Ruud van Nistelrooy claimed the emergence of Cristiano Ronaldo at from teen ace to world's best was the greatest fulfilment of potential.

After naming Jeremy Monga (15) and Jake Evans (16) to his City squad for Friday night’s game against Manchester United at Old Trafford, the Foxes boss was asked which young players who came good impressed him the most. He replied: “There are so many - but seeing a young come into the Manchester United dressing room and develop, within three years, into the best player in the , was the greatest development I've ever seen.

"So if you see how he works, how he lives his life to be the best he can be - that's the elite standard. He came into our dressing room with those standards, and he's said in interviews, I came into that dressing room and I had to live up to those standards every day.

"He was open to learn and improve, and he worked and worked and worked every day, on the pitch, in the gym, in the recovery sessions, in his food, in his treatment. When you have seen those standards at the highest level, and you experience what that is - there are not many players who know that - so I was lucky.

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"I feel privileged that I can share that knowledge, and they became my standards. So when I see Cristiano or a 19-year-old Xavi Simons come from Paris (Saint Germain) on a free - he believed in the pathway at PSV with me as the manager, with the training model we have to improve young players.

"He bought into it and the rest is history. It's standards and talent combined.”

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