By Martin Domin Tyson Fury last night laid bare the brutal realities of boxing after the death of debutant Sherif Lawal. Lawal, 28, was rushed to hospital on Sunday after collapsing during his professional bow in Harrow, west London. He had been knocked down in the fourth round by Portuguese opponent Malam Varela before being treated by paramedics. Lawal was later pronounced dead and Fury paid tribute as he said: “God rest his soul.” Fury takes on fellow world heavyweight champion Oleksandr Usyk in their long-awaited unification fight on Saturday. But he revealed he has long accepted his own f…