Fabian Delph has said that he owed himself a chance to compete for trophies and play in the Champions League after completing a move to Manchester City.
The former Aston Villa captain signed for Manuel Pellegrini's side earlier, less than a week after insisting that he would not be leaving Villa Park.
The England international said in a statement: "When I was made captain of Villa it was a huge honour for me and I took the responsibility incredibly seriously. I signed my new contract last season with the view of staying at the club for the duration of the deal and never with the intention to leave a year later.
"As a kid watching the game on TV and then as a young footballer you dream about testing yourself against the best in the world, to compete for major trophies and to play in the Champions League. I've proved that I can play at the very top level with England and believe I owe it to myself to take the challenge of playing for one of the biggest clubs in the world in Manchester City.
"I have been immensely proud to captain such a great club and want to thank everyone at Aston Villa, most importantly the fans, for the amazing support they have shown me during my time there. I am now excited for the future with Manchester City and helping the club to succeed in the coming season and beyond."
Delph has described the transfer as the "hardest decision" that he has ever had to make.