The Argentine midfielder is said to want a fresh challenge after Chelsea's difficult season ended without European football.
*The Argentine midfielder has told Chelsea he wants to leave, but the club will demand well over £100m for his signature.*
*The club have backed their head coach to lead an immediate promotion push after Sunday's drop to the Championship.*
*A bad-tempered London derby ends 2-1, leaving Tottenham and West Ham both facing the drop on the final day.*
