Dave Allen shakes his head at how his homecoming against Filip Hrgovic came together but the British heavyweight hopes to snatch his “million-to-one shot” this weekend. The affable, self-deprecating ‘White Rhino’ packs a punch although he readily accepts a fight against Hrgovic, who is ranked in the top 10 by all four major sanctioning bodies, is a mismatch on paper. Hrgovic will be looking to use the bout as a springboard to challenging for a world title, with Allen simply grateful for a chance to fight at Doncaster’s Eco-Power Stadium, a 10-minute walk from his home. “I don’t know how I got here, really, how I’m boxing Filip Hrgovic on Saturday, I’m still none the wiser, don’t know whose idea it was – mental isn’t it?” a grinning Allen told the Press Association. “I hope we find out on Saturday when I chin him. It doesn’t make any sense. I’m actually quite chilled about it because anyone who knows boxing knows I’m a million-to-one shot and I love that.…