The 24-year-old midfielder has quit Reading after rejecting a new £25,000-per-week, four-year deal and opted to join the Blues despite interest from Newcastle United, Everton and Aston Villa.
He is Jose Mourinho´s first signing of the summer and will be a valuable addition to the squad.
© Copyright PA Sport Ltd 2007, All Rights Reserved.
Do YOU want to write for GiveMeSport? Get started today by signing-up and submitting an article HERE: http://gms.to/writeforgms