This is a good test for Smith who is moving up to Light Heavyweight after losing to Canelo Alvarez at Super Middleweight. Lenin Castillo is a former title challenger who possesses power and has shown toughness in the past. Castillo isn’t the most active in terms of punch volume and may struggle with a potentially rejuvenated Callum Smith.
I think Callum Smith will win this fight by decision after ten rounds due to being technically better and likely out working Castillo.
Boxing Fulcrum 