Main Events has filed a lawsuit against a number of parties the promotional firm contends interfered with a tentative fight between Adonis Stevenson and Sergey Kovalev, who is represented by the company, Main Events CEO Kathy Duva confirmed.

The complaint alleges breach of contract, breach of fiduciary duty, fraud, tortious interference and interference with prospective economic advantage on the part of promoter Yvon Michel, Groupe Yvon Michel Inc., advisor Al Haymon, Golden Boy Promotions, Stevenson and Showtime, according to Sports Illustrated, which broke the story.

Duva told SI that she is seeking “millions”in damages.

Main Events alleges that Michel, a Canadian promoter who handles Stevenson, reneged on a deal to stage the light heavyweight fight between his client and Kovalev. The company also accuses Haymon, in conjunction with Golden Boy, of interfering in attempt to make a fight between Stevenson and Bernard Hopkins, who is handled by Haymon and Golden Boy.

And, finally, the suit alleges that Showtime made an offer to televise Stevenson-Hopkins without regard for the purported Stevenson-Kovalev agreement.

"Our general feeling is that I have to protect myself and my fighter," Duva told RingTV.com. "When bullies come through and blow away deals that have been made in good faith, then you have to call them out or they're just going to keep doing it to you. This is a big, powerful group of people who got together and, after I made a deal for my fighter for a fight that he very much wanted to have, they came along and killed it. They're going to have to answer for that. They're going to have to pay for that.

"There's a reason why there are rules, and when people break them, that's why we have the courts, in order to fight a big powerful group like this. That's why the courts are there, so that people can not take advantage of their power and stomp on people like me."

Stephen Espinoza, executive vice president at Showtime, said he wasn't aware of the lawsuit.

"Haven's seen it, haven't heard about it, so I can't really comment," he said. "I have no idea. If we get served, well, then, we'll take a look at it. Until we know what we're talking about, then there's no comment.

Schaefer said his company wasn’t involved.

"I have no idea why Golden Boy would even be mentioned," he said. "… So I'm going to have our attorney deal with it. I have no clue why they would even mention us, let alone, involve us. Whatever it is, we'll deal with it."

Michel wouldn't discuss the lawsuit with SI. Haymon could not be reached for comment.