Cristiano Ronaldo: 'I can remain at top for years to come'

Real Madrid forward Cristiano Ronaldo has vowed to "keep going at the highest level for years to come", as he offers a strong response to his critics.

  "On a personal level, this is a fantastic time for me," he said. "I have a growing family and I am very happy with my life. On a professional level, I have had two very good years in which I have won titles with my club and with my national team. I feel that I can keep going at the highest level for years to come. "Life is a challenge from all perspectives and I try to be at my peak, physically, because this is very important in my profession. I have to be at 100 per cent and I take this very seriously. "To maintain this level, you need to make sacrifices. There are certain things that I could do when I was 20 that I can't do today. You have to try and find a balance. It's the finer details that make a difference. "I am ambitious, very ambitious. People should chase their dreams. I chased mine and I want to keep doing so, to improve and achieve even more goals. I believe I've had some memorable performances throughout my career but can't recall any in particular. I try to focus myself more on the present than on the past."