Sheldon Adelson will be confronted in court for the first time with allegations of wrongdoing by a man he fired five years ago as the head of his Macau casinos.

Adelson, the 81-year-old billionaire founder and chairman of Las Vegas Sands Corp., is among the casino operator’s top executives listed as witnesses for a hearing starting Monday in a lawsuit brought by Steven Jacobs, the former chief executive officer of the company’s Macau unit.

Jacobs hasn’t had a chance during the 4 1/2-year-old Nevada case to put his ex-boss on the witness stand. He claims he was fired for balking at what he says were illegal demands, including to dig up information about high-ranking Macau government officials that, according to a court filing, could be used to “exert leverage.”

“There’s going to be mudslinging,” said Greg Doll, a lawyer at Doll Amir & Eley LLP in Los Angeles who isn’t involved in the case. “You can bet your bottom dollar that Jacobs is going to bring up stuff that is uncomfortable for Sands China and for Adelson in particular.”

Adelson denies allegations he ordered secret investigations into the business and financial affairs of government officials, as well as Jacobs’s claim that he personally approved a strategy condoning prostitution at the Macau casinos. Sands has said in court filings that Jacobs was dismissed for working on unauthorized deals and violating company policy.