Cuban on Tuesday, in a court filing, responded to a May lawsuit filed by Perot that alleged the Mavs were insolvent or in imminent danger of insolvency.
Perot's lawsuit puts his Hillwood Investment Properties III Ltd. against Cuban-controlled Radical Mavericks Management LLC. Perot in 2000 sold his majority stake in the team to Cuban, but still holds 5 percent.
Cuban maintains Perot is wrongly seeking money to offset some $100 million in losses on the Victory Park real estate development.
Perot spokesman Eddie Reeves said his boss had no comment on Cuban's filing.