Its good to know that there's a rematch because this is the chance for Ancajas to regain the world title again. In their last fight, Ancajas is lacking of defense and power punches, it seems like he's not in good condition or should I say not prepared at that time. Well, I hope he will redeem himself because he is just starting to establish his name and not yet had a strong opponent aside from Martinez.
Saying those as a reason why Jerwin loses on their first match seems not acceptable. He should always prepare once there's an upcoming fight and be in his good health condition as possible not unless he has already an issue during the practice or got injured while in practice.
In this rematch, no reason should rise again. He needs to win at any cost as this rematch is his ticket to redeem himself on that loss. From now on, losing is not an option to chase the title he wants to get. Like other said here, a possible 3rd match might be next in line if Jerwin wins in this rematch.