Professional poker player Phil Ivey has been sued by the Borgata in Atlantic City, which claimed the $9.6m he won at the casino in 2012 was earned through cheating at high-stakes mini-baccarat.

Phil Ivey

The casino, which is 50 per cent owned and managed by Las Vegas-based Boyd Gaming, claims Ivey, one of the world’s best known poker players, manipulated a defect in the playing cards through a special manner of dealing that he requested.

According to the lawsuit, filed last week in the US District Court in New Jersey, Ivey was assisted in the scheme by an associate who spoke Mandarin Chinese with the dealer.

Ivey has won nine World Series of Poker individual champion gold bracelets and has earned more than $19m in tournament poker winnings, according to the PokerPages.com database.

He was accused by the Borgata of “edge sorting,” which violates New Jersey casino gambling regulations.