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Former WBC middleweight titlist Julio Cesar Chavez Jnr has apologised for his recent drugs test failure on his official Twitter account.

"Any attempt to explain or justify the recent developments will be of little or no convincing, so I want to let everybody know that I take full responsibility for my actions and the consequences thereof," he wrote in Spanish.

Chavez tested positive for marijuana after losing his title to Sergio Martinez last weekend.

25/09/2012 14:03:53