The same day someone from the company's official Twitter account announced the fight, Shark Fights officials since have denied that their next event will feature a heavyweight headliner between ex-WWE star and Strikeforce vet Bobby Lashley (6-1) and UFC vet Tim Hague (13-5).

Shark Fights officials today told MMAjunkie.com (www.mmajunkie.com) the fight hasn't been booked.

They also said they "have no idea" who tweeted the news from the company's Twitter account.

"It's not Tim Hague," Shark Fights CEO Bud Brutsman said. "We haven't even signed him."

Shark Fights 21 takes place Nov. 11 at Fair Park Coliseum in Lubbock, Texas. The event airs via delay on FUEL TV on Dec. 23.

Early this morning, a tweet stated that Hague would be filling in for Shark Fights heavyweight champ Darrill Schoonover (11-5), who was forced out of the Lashley fight with a shoulder injury this past week.

There's no word on who ultimately will take the spot. However, Brutsman said it'll be the for the title since they've stripped Schoonover of the belt.

Lashley, who recently signed a three-fight deal with Shark Fights, hasn't fought since a decision victory over John Ott at Titan Fighting Championships 17 in March. The victory followed his first and only career loss: a second-round TKO (via retirement) to Chad Griggs at "Strikeforce: Houston."

Shark Fights is a Texas-based promotion and one of the more successful regional promotions. In addition to FUEL TV, events sometimes air on HDNet.