By Harry Davies Frank Warren has slammed Carl Froch for criticising Tyson Fury after he pulled out of his undisputed fight with Oleksandr Usyk. Fury was scheduled to fight Usyk for the undisputed heavyweight world titles on February 17, but was forced to withdraw on just over two weeks’ notice after being cut in sparring. He needed 11 stitches to fix the cut above his right eye and has since returned from Saudi Arabia to his home in Morecambe after the cancelled fight. Froch reacted to Fury being cut by questioning the legitimacy of his injury, as the former world champion said on his YouTube …