SOUTHAVEN, Miss. – Will Brooks’ upset of Michael Chandler on Saturday would seem to mean he’ll get Eddie Alvarez.

But not so fast. Bellator CEO Bjorn Rebney said a clause in Alvarez’s contract could throw a wrench into the works.

Brooks scored a big upset of Chandler in the Bellator 120 co-main event on Saturday at Landers Center in Southaven, Miss., just south of Memphis. The card was Bellator’s first on pay-per-view, and Brooks won the promotion’s interim lightweight title with the win.

Brooks took the fight with Chandler on just a week’s notice after Alvarez had to pull out of his trilogy rematch with Chandler thanks to a concussion. With heavy odds against him, Brooks took a split decision with scores of 48-46 and 48-47, while Chandler got a 48-47 from one judge.

But when Alvarez signed his new deal with Bellator, it was for a guaranteed fight with Chandler, Rebney said. Contractually, if that’s what Alvarez wants for his next fight, that’s what Bellator may have to give him.

That would mean Brooks, as the interim lightweight titleholder, may be on hold for a titel unification bout with Alvarez, whose return time table is not yet known.

“The reality of the situation is that Ed’s contract specifies that his next fight be against Michael Chandler,” Rebney said after Saturday’s post-event news conference. “So Ed now is in a position where he can choose to fight Chandler, and contractually we have to give him the Chandler fight. … It’s a situation we’ll have to sit down and discuss with him, and figure out where it goes, because he’s got paperwork and he’s got a contract that gives him the right to demand the Chandler fight.”

Alvarez tested the free-agent market in 2013 and got an offer from the UFC. Bellator matched the deal, but the situation played out in the legal system behind the scenes before Alvarez ultimately re-signed with the promotion – getting a rematch with Chandler at Bellator 106 this past November, where he won back the lightweight title.

The trilogy was set for Bellator 120 on Saturday before he was forced out.

Rebney told MMAjunkie that if Chandler demands his trilogy fight with Alvarez, it may put Bellator in an awkward position. Chandler would be fighting the lightweight champion coming off a loss to the interim champion.

“It brings up a lot of interesting questions,” Rebney said. “It puts us in a difficult spot, but we’ll see what Ed’s position is and how to work through it. But right now, I don’t have as much flexibility with (what the next fight is).”

Rebney said the past tension between the fighter and the promotion may not matter this time around, though.

“There’s no hostage holding,” Rebney said. “He can demand the Chandler fight or not. Chandler’s still one of the greatest lightweights in all of MMA. Mike Chandler lost to an amazingly talented fighter tonight.

“So we’re going to have to sit down with Ed and talk through it, because he does have paperwork that pushes us in one direction.”

For complete coverage of Bellator 120, stay tuned to the MMA Events section of the site.