• Frank Lampard and Didier Drogba among senior players rested• 'We are a happy family,' claims interim manager Di MatteoRoberto Di Matteo claimed Chelsea are united after dedicating his side's 2-0 victory over Birmingham City to the departed manager, André Villas-Boas, as the Premier League club forced their way into the quarter-finals of the FA Cup.The interim first-team coach rested a number of senior players, with Frank Lampard and Didier Drogba starting on the bench for Tuesday night's game against Championship opponents, offering a clear indication that Chelsea's priority is to secure a top-four finish in the Premier League. Those omitte...