Real Madrid Castilla are set for a summer of change, with key players Rafa Marin, Carlos Dotor and Sergio Arribas expected to leave. Castilla, the side made up of Real Madrid’s brightest prospects, have decided that all three players have come to the end of their three-year cycles with the reserve team of the club. There is an agreement in the idea of centre-back Marin signing a contract renewal and leave on loan. The length of any new deal and subsequent exit have yet to be discussed, but Marin is keen on Real Betis, while Villarreal and Celta are also interested. Celta Vigo are well...