Nigeria international John Obi Mikel has criticized the leadership of Premiership side Chelsea for frequent change of coaches.<br /><br />Since joining the current European champions from Norwegians Lyn Oslo in 2006, the defensive midfielder has played under eight managers.<br /><br />"The club is crazy, it is. But we have to keep doing our job. We're players. <br /><br />''The board, the owners, make the decision and we have to stick by whoever comes in. I don't know what's happening. It seems another manager is going to come in. <p> "If we are the in the same final next year, I won't be happy. The aim of this squad is to play in the Champions League,'' Mikel was quoted as saying by <i>ESPN.</i></p> <p>Obi Mikel has missed the last five matches played by Chelsea due to injury but is expected to feature against Benfica in the Europa League final next Wednesday.<br /></p>