He beats both..Graziano he would more then likely stop relatively early I think..probably before the 6th. Against Tony he is probably in it for the longer the haul but his superior skills and ring craft get him a decisive victory..probably a late stoppage.
Haglers chin was far too good for him to be topped here. Marvin is too good a boxer for these two. Marvin wins both matches
Im not sure how anyone can say Greb could definitively beat Marvin when there is next to nothing of him on film.