Valentina has fought Joanna three times in the past in Muay Thai. I think this would be a GREAT fight and i hope that the UFC makes this happen. Valentina has two decision losses to Amanda Nunes and one TKO loss to Liz Carmouche.
I have a hard time picking a winner in this fight and would need to see the fighters stand next to each other to form a better opinion. Joanna is one inch taller but her frame is much slighter and it will be interesting to see how she carries the weight.