"I feel he'll stay in rugby," Mundine, a former NRL player turned professional boxer, said.
"As great as rugby league is, rugby is the world game. Lots of countries play it all over Europe and South Africa, it's massive. I went to South Africa to watch him play a [Super Rugby] game and they had fans waiting outside the hotel room. It's a big thing. It's the biggest sport over there. It's crazy."