 Complete the following phrase:  On 13 June 2012, Chelsea announced that Di Matteo had been appointed manager and first-team coach on a permanent basis signing a two-year contract with the club. Chief executive Ron Gourlay said: Although he Di Matteo has set the bar very high in the short time he has been in charge, we know that Roberto is the right man to lead Chelsea onto further success. Gourlay added: We are already looking forward to the 201213 season which kicks off when Roberto, his staff and players return for pre-season. Chelsea lost in the 