 Complete the following phrase:  On 13 June 2012, Roberto Di Matteo signed a two-year contract, becoming Chelseas permanent manager, having been appointed as interim manager after the sacking of André Villas-Boas during the 201112 season. However, on 21 November 2012, Di Matteo was sacked after a 30 loss away to Juventus in the UEFA Champions League, with Rafael Benítez replacing him as interim manager until the end of the season. On 15 May 2013, Chelsea won their first and only silverware of the season, winning the 