If it's mandatory then Donaire must prepare hard to win this fight. Donaire still has a lot to prove but to be honest, it will also be a challenging match for Reymart as well. Gaballo is playful and aggressive on the ring and his moves are unpredictable and it's something that Donaire should be ready about.
Donaire has face a lot of awkward boxer, so for sure he knows what to expect and what to do with Reymart. Not underestimating Gaballo as he is a Filipino and we all know that Filipino boxers love to fie to to toe, but if he is not smart then I'm seeing Donaire taking him down with a good left hook, which is Nonito's main weapon. And if Gaballo will be very aggressive, expect Donaire to used his experience and then to time him when he is going inside.