Since he plans on fighting Nganou, John McDermott III, Price, Haye, Ike Ibebuchi, Holyfield, Canelo, with a fourth fight against Chisora as a swan song, he will definitely be undefeated.
The 0 is the most overhyped thing ever. Just because a boxer loses one time let alone two or three times, doesn't mean all of a sudden they are worthless. Look at the UFC, all the top fighters have numerous losses and still fight the best. The whole 0 undefeated thing is what's really hurting boxing.