By Rick Reeno

Boxing adviser Sampson Lewkowicz has informed BoxingScene.com that middleweight king Sergio Martinez (49-2-2, 28KOs) will sign an agreement, within the hour, to face the winner of Julio Cesar Chavez Jr. vs. Andy Lee.

According to Lewkowicz, Martinez will face the Chavez-Lee winner on the tentative date of September 15th. Lewkowicz, along with his wife, are 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.

Lewkowicz, along with Martinez, plan to sit ringside for Chavez-Lee.

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.

"Me and my wife are at the Bel Air Hotel and we're waiting for Sergio Martinez to arrive to sign an agreement to fight the winner of Chavez-Lee on September 15. We expect that Chavez, along with [Top Rank CEO] Bob Arum, Andy Lee and [Lee/Martinez promoter] Lou DiBella will sign it as well. If anybody does not sign this agreement, then June 16th will be a non-title fight because the WBC will vacate the title," Lewkowicz said to BoxingScene.com.