By Martin Domin Francis Ngannou has admitted he has lost the element of surprise ahead of his clash with Anthony Joshua. Ngannou made his professional boxing debut against Tyson Fury last October, dropping the heavyweight world champion in the third round before going on to lose a controversial split decision. Ngannou has agreed to fight former two-time champion Joshua in Saudi Arabia – but knows his rival will have an advantage over Fury. “Obviously the most complex now is AJ because I haven’t fought him,” he told Mail Online. “I watched the fight and he looked good. He was showing all the ri…