There are only a few fighters in the UFC currently that when they fight their opponent knows they won't break their will, their opponent knows they won't be broken mentally in the cage. Fighters such as Frankie Edgar, Diego Sanchez, Jon Jones, Robert Whittaker and Big Nog will continue in a fight no matter what injury they have. You have to be able to KO them, put them to sleep in a sub or dominate them completely to win as they won't tap to a sub. It's another level when fighting knowing that you have someone across from you that will never give up so you have to be extra ruthless. Diego and Frankie will go bell to bell never giving up throughout. Vitor Belfort said he felt Jon Jones' arm pop in the submission which is why he released. Jon just pushed through the pain, plus a broken arm in the OSP fight. Robert Whittaker continued with a broken hand in the romero fight. Big Nog refused to tap to Mir until the break. I also remember Renzo refusing to tap to Saku Who are other fighters in your mind that stand out in this way?