Watch: Promoter says Pacquiao will fight McGregor if Mayweather doesn't

Boxing promoter Bob Arum claims Manny Pacquiao is willing to step into the ring with Conor McGregor if his long-rumored bout against Floyd Mayweather fails to materialize.

Pacquiao will face Australia's Jeff Horn on July 2, and Arum told TMZ Sports his schedule is open after that should McGregor still need an opponent.

Arum also offered some advice to UFC president Dana White about how to go about negotiating the McGregor-Mayweather fight.

"Be patient. Don't give in," he said. "Dana's a good negotiator, and he'll get the thing done, but he can't be pushed around by Mayweather and his people."