This will be an interesting fight in that I think we will find out a lot about Rios and Manny. If Manny is done, Rios is a guy you don't want to fight. He has a good chin and good power - so if Manny's tank is empty, the pain train could be coming.
Rios on the flipside has shown no boxing skills at all. When Alvarado started to box him (and Alvarado's boxing skills are pretty pathetic) Rios had no clue how to cut of the ring or make his offense effective. No way prime or over the hill do I think Manny stands and trades with Rios - that has never been his style. If Manny uses his usual movement, he should get all his offense off against Rios.
That said, if Manny is
we will find out, because Rios will not let up and will stand and take to land his punches.