“These guys have a life outside. They have families to look after. They have other things going on. I don’t have anything else going on besides chasing this mother f**king title.” That's 27-year-old UFC rising star Marvin Vettori putting the entire middleweight division on notice ... telling TMZ Sports his singular goal in life is to SMASH Robert Whittaker and Israel Adesanya -- and get the championship belt.