Crowd chants ‘Pay your taxes!’ at Floyd Mayweather during McGregor press conference in Toronto

The IRS says Mayweather owes millions in unpaid taxes.

At the Toronto press conference on Wednesday for their Aug. 26 fight, Conor McGregor and Floyd Mayweather traded barbs during several-minute speeches. McGregor went first, and then Mayweather stepped to the podium. He was greeted by chants of “Pay your taxes!” from a crowd of several thousand at the city’s Budweiser Stage.

The IRS says Mayweather owes more than $22 million in taxes from 2015, but he’s in line to make more than that when he fights McGregor. When Mayweather waved a $100 million check at McGregor during their Los Angeles press conference on Tuesday, the Irishman responded that it was “for the tax man.”

McGregor had dinged Mayweather over his financial woes before:

“I don’t give a f*ck what he did,” McGregor said while shopping in Beverly Hills. “I don’t give a f*ck. I don’t care what he done. He should've stayed retired. He’s f*cked now. That’s the god’s honest truth. He should have paid his taxes and stayed retire. And kept my name out of his f*cking mouth.”

The crowd in Toronto was cool to Mayweather all the way around. The fans also booed him when he bragged about wearing a Canadian maple leaf on his Money Team clothes.

The full press conference video is here: