How about Marcell Coetzee, Elrigh Louw and Cameron Hanekom against Phepsi Buthelezi, Emmanuel Tshituka and Siya Kolisi?That is a possibility when the Bulls travel to Durban to tackle the Sharks at Kings Park in tomorrow’s United Rugby Championship showdown (6pm start), and it’s a battle that could have a major bearing on the outcome.South Africa have always been blessed with outstanding loose forwards, and it’s no different for the Bulls and Sharks.But this weekend, the Pretoria side are hurting from two consecutive Champions Cup defeats, to Saracens away and Harlequins at Loftus…