Connal McDonald's warning for Lucas Roehrig: 'I beat Daniel Dubois in the amateurs. I'll be treating this the same'
Scottish champion Connal McDonald fights top cruiserweight prospect Lucas Roehrig this Saturday at the Copper Box Arena; <strong>The Zuffa Boxing 12 event is headlined by Chris Billam-Smith's clash with Cheavon Clarke, watch live on <em>Sky Sports</em> on Saturday</strong>