By Rick Reeno

BoxingScene.com reached out to boxing adviser/promoter Sampson Lewkowicz, and spoke directly to middleweight king Sergio Martinez (49-2-2, 28KOs), who confirmed that he officially signed, at 7PM PST, an agreement to face the winner of Julio Cesar Chavez Jr. vs. Andy Lee - on the tentative date of September 15th. Lewkowicz, along with his wife, held a meeting with Martinez at the Bel Air Hotel in Beverly Hills, California.

As BoxingScene first reported on Tuesday, a deal was reached for Chavez Jr. (45-0-1, 31KOs) to defend his WBC middleweight title against Lee (28-1, 20KOs) in an HBO televised fight on June 16th at the Sun Bowl in El Paso, Texas.

The World Boxing Council positioned Martinez as the mandatory challenger at last December's convention in Las Vegas. The sanctioning body expects all of the required parties to sign this agreement.

"I have officially signed the agreement. [WBC President] Jose Sulaiman expects everyone involved to sign this agreement - including Chavez, Lee, [Top Rank CEO Bob] Arum and [Martinez/Lee promoter] Lou DiBella. If they don't sign the document [prior to June 16th], Jose Sulaiman has made a promise that the WBC title will not be on the line on June 16, because they will take the title away," Martinez said to BoxingScene.com.

Martinez, who plans to sit ringside at the Sun Bowl, expects a very close fight.

"It's going to be a very tough fight for both of them. I think it's a 50-50 fight," Martinez said.

Tags: Julio Cesar Chavez Jr , Sergio Martinez , Andy Lee , Chavez-Lee , Chavez vs Lee