Yesterday, ahead of the fight, both men took part in the weigh in and both, unsurprisingly given their experience and professionalism, made weight.
On the scales Nietes, who is moving up from Light Flyweight, was 112lbs. He looked no different to how he was as a Light Flyweight and whilst we suspect he was struggling to make Light Flyweight he's not set out to muscle up for this bout and is instead fighting at his natural weight.
Sosa on the other hand was 111½lbs, the lightest he's been in years. It's clear he's taken the bout really seriously and will know that a loss here will, potentially at least, be the end of his career.
(Image courtesy of Zanfer Promociones)