Villas-Boas this morning spoke of how tough a decision it was for him to leave Porto after securing four trophies in his first season in charge, and revealed that they had been prepared to match Chelsea's financial offer in an effort to keep him.
"It was a difficult separation and there are a lot of Portuguese press in this room who know the extent of my move and the impact it had.
"It was felt very hard in Portugal but my commitment to them was 100 per cent. Porto is my club and always will be, I felt good there and we had a successful year.
"It was difficult but everybody in this room will have felt the need for a new challenge and I felt it.
"We had a crazy year of success but I felt that I could challenge myself (more at Chelsea).