The casino operator and its former chief executive, Steve Wynn, are being sued for allegedly rigging the application process to win the license for the Boston area’s only casino.
The lawsuit, citing a lack of "honest competition," also names CEO Matthew Maddox and former General Counsel Kim Sinatra as some of its defendants.
Sterling Suffolk Racecourse is seeking over $1bn in damages, which could triple under the racketeering law.
However, a written statement from Wynn Resorts has denied the claims put forward.
It said: “This lawsuit was brought by Richard Fields, an unsuccessful applicant for the license awarded to Wynn Resorts. His claims are frivolous and clearly without foundation.”
The Massachusetts Gaming Commission is currently preparing to announce whether it will permit Wynn Resorts to operate the casino, construction of which is nearly finished.
