A Japanese gaming industry billionaire who owes $54 million to Bartlit Beck has brought in new lawyers from Dentons to argue that an arbitration panel violated his due process rights when it ruled he has to pay up.

In a March 19 filing in Chicago federal court, Kazuo Okada said his doctor told him not to travel to the United States for the arbitration hearing, which was set for late October and early November. The hearing was centered around Okada’s refusal to pay Bartlit Beck a $50 million contingency fee after the firm represented him in a legal dispute with Wynn Resorts that eventually resulted in a $2.6 billion settlement.