The same situation with Ancajas because he originally prepared for a title defense fight against Kazuto Ioka but was replaced last minute by Fernando Martinez and Ancajas ultimately lost the title he held for quite a long time. These instances can't be predicted because the original boxer wanted to participate in the fight but an issue surfaced later on which resulted in a need for a substitute just like this time.
Even if there's no sudden replacement, Jerwin Ancajas might probably still lose that supposed original fight.
The reason is very clear and it was stated by his team. Ancajas is not in good shape because of his hard training to catch the required weight. That resulted in him not performing on his usual and Ioka might take that as an advantage.
As I read on some reports, that's the focus now of Ancajas camp as they are really preparing seriously to get a win on a rematch against Martinez.
We can't know that for sure because aside from the fact that Ancajas was struggling to catch the required weight, his trainings were originally made for Ioka and the team was studying the Japanese boxer's move for quite some time to help Ancajas win the fight but that didn't happen because of Ioka's sudden decision. Not sure though why Ioka backed out, does anybody here know why?