"Sir Alex Ferguson heard my arguments, I heard his and, in fact, it was settled that the best for both parties would be for me to stay," he told Portuguese newspaper Publico.
"Therefore, I can confirm that, next season, I will play for Man United.
"Before rumours emerge saying that I will play against my will, I want to make this clear - whoever says or writes that is lying.
"I will play for Manchester with all my heart and soul. I will fight and honour that shirt with the same commitment and dedication as always.
"I was responsible for all this controversy," he added. "I was the one who publicly expressed my desire to go to Real Madrid. I ended up being, even involuntarily, responsible for the poor relationship between the two clubs.
"I knew Real Madrid were interested in signing me and that they had allegedly made a very high offer to Manchester United.
"My desire was, for some time, that Manchester had accepted my transfer to Madrid. Saying otherwise would be to trick people and my own consciousness."