Top Rank promoter Bob Arum wants WBO welterweight champion Terence Crawford to take on former UFC titleholder Conor McGregor in a two-fight deal - first, they meet in the Octagon, then the ring.
"You don't think that would be interesting and something the public would want to see?" Arum told ESPN's Dan Rafael on Wednesday. "I think it's very realistic."
Arum confirmed there have been some talks between the sides but did not provide further detail.
McGregor crossed over to boxing in 2017 to take on Floyd Mayweather but lost via 10th-round TKO. It was one of the biggest matches of all time and sold the second-most pay-per-views in sports history.
McGregor, the former UFC lightweight and featherweight champion, returned to the MMA cage for the first time in more than a year last weekend at UFC 246. The Irishman defeated Donald Cerrone by first-round TKO in Las Vegas.
Before and after UFC 246, McGregor said he wants a boxing rematch with Floyd Mayweather. He also expressed interest in a meeting against Manny Pacquiao.
Crawford is undefeated at 36-0 and considered one of the best pound-for-pound boxers in the world.
In his last bout, "Bud" topped Egidijus Kavaliauskas via ninth-round TKO in December to retain the WBO belt.