Casino mogul Sheldon Adelson is presenting a more cantankerous face his second day of testimony in a breach of contract case in Las Vegas.

Attorneys for Hong Kong businessman Richard Suen say Sands owes him $328 million because he worked behind the scenes to help the company win a gambling license in the Chinese enclave of Macau.

Sands attorneys say the casino company won the license on its own.

On Thursday, Adelson joked and smiled during questioning about how Sands won entry into Macau in the early 2000s.

On Friday, he sparred with Suen's attorney, prompting a reprimand from the judge.

Adelson repeatedly claimed ignorance of letters and meetings that Suen's team highlighted. He cited the effects of an illness, peripheral neuropathy, which first struck him during those years.