Xman52's talking rubbish again. When Calzaghe Fought Lacy there was no Linear champion, and they weren't the consensus top two in the world. Same with Kessler-Beyer. before those two fights all 4 were simply title holders. Afterward the two unifications Kessler was as much a champion as Calzaghe was. Calzaghe-Kessler crowned the undisputed champion. It's simple. The fact that the IBF stripped Calzaghe after the Lacy fight is irrelevent.