Diego Sanchez (Pictures) will return to the Octagon June 21 in Las Vegas in the main event of "The Ultimate Fighter 7" finale, sources have told Sherdog.com. He is expected to square off against Luigi Fioravanti (Pictures) in a welterweight tilt that will follow a series of bouts involving participants of the upcoming season of the UFC's reality show.

Though the fight has not been officially signed, both sides have verbally accepted.

Sanchez, 25, ran his record to 18-2 by dominating David Bielkheden (Pictures) at UFC 82 earlier this month. It was his first win since dropping consecutive decisions to Josh Koscheck (Pictures) and Jon Fitch (Pictures) in 2007. Despite falling out of UFC welterweight contention, Sanchez will draw the headlining gig on SpikeTV, showing the UFC's confidence in the former TUF winner's drawing power.

Fioravanti (12-3-0) fought at UFC 82 as well, garnering a unanimous decision over another former TUF star, Luke Cummo (Pictures). The 27-year-old native of Orlando, Fla., has had mixed success in the UFC, losing his previous two contests before his recent win. This will be Fioravanti's first main event on the big stage.