Americans are expected to bet about $4.76 billion on Super Bowl 52 between the New England Patriots and Philadelphia Eagles, according to The American Gaming Association.
More than 97% of the total wagers will be bet illegally across the United States, which includes local bookmakers and various offshore sportsbooks.
"Thanks to the failed federal ban on sports betting, Americans are sending billions of their hard-earned dollars to corner bookies, shady offshore operators and other criminal enterprises," Geoff Freeman, president and CEO of the American Gaming Association, said in a statement. "The big question we're asking: Is 2018 finally the year when governments, sporting bodies and the gaming industry work together to put the illegal sports betting market out of business?