Former middleweight champion Arthur Abraham admits he has a point to prove when he challenges world super middleweight belt-holder Robert Stieglitz on Saturday. Abraham, 32, is facing retirement if he loses the world title bout in Berlin. Having held the IBF middleweight belt from 2005 to 2009, Abraham made 10 successful defences before losing three of his four bouts during the Super Six super-middleweight bouts when he stepped up a division. Having fought his way back to claim the European WBO super-middleweight title earlier this year, Abraham takes on compatriot Stieglitz for the world crown and says he will let his fists do the talking. “Actions speak louder than words and I am going to answer all questions inside the ring,” he said.