Great stable , my bruv used to watch Nelson spar in Gran Canaria years ago when they had an open air gym at the Anfi Beach resort, his mate went on to open his own gym in the Canaries that Brook and a few others use a fair bit still to this day.
I heard a story years ago that Graham used to stand with his toes on one end of a newspaper in the middle of the ring with another fighter mirroring him literally toe to toe and still no one could land clean to head or body ?
Forgot Naz only lost to Barrera by 1 round so yeah that def rings true.