Sergio Martinez to have knee surgery

After going back and forth on whether he would have surgery on his injured right knee or opt for rehabilitation, middleweight world champion Sergio Martinez has decided he will have surgery.

Martinez will undergo the arthroscopic procedure in Spain to repair a partially torn meniscus that he suffered when he was knocked down in the electrifying 12th round of his unanimous decision victory against Julio Cesar Chavez Jr. on Sept. 15 at the Thomas & Mack Center in Las Vegas.

Martinez, of Argentina, will have the surgery on Nov. 12 in Spain, where he lived for several years and has been visiting since the fight.

"We are happy with the medical findings, everything will be faster than expected," Martinez said. "I need the gym."

After the fight, in which Martinez also suffered a fractured left hand, a cut over his eye that required stitches and a gash in his scalp that needed to be stapled closed, it was announced that he would have knee surgery.

But after follow-up tests, his doctor thought there was a chance he would only need rehabilitation. Ultimately, however, Martinez elected surgery on advice of his doctor.

"He did several tests and the doctor decided that he had no choice but to have the surgery," Sampson Lewkowicz, Martinez's adviser, told ESPN.com. "My understanding is after the surgery he will take 4 to 6 weeks for rehabilitation, and after that he can go back in the gym and train lightly. He will be ready to fight in April or May."

Lewkowicz will be in England to watch his welterweight contender, Hector Saldivia, face Kell Brook in a title elimination fight on Saturday before going to meet Martinez in Spain. Together, Lewkowicz said they will fly from Spain to Argentina so Martinez can participate in a planned charity event and also meet the president of Argentina as part of his celebration for defeating Chavez.

After that, Martinez (50-2-2, 28 KOs) will go back to Spain for the surgery, Lewkowicz said.

"Everything else is fine," Lewkowicz said. "The hand is almost recuperated."

Lewkowicz said there have been no discussions yet between he, Martinez and promoter Lou DiBella about the next fight for Martinez. He shot down reports that Martinez, 37, could face junior middleweight titlist Saul "Canelo" Alvarez in the spring.

"Whatever you see on the Web about Canelo and Sergio 'Maravilla' Martinez, it is all bull----," Lewkowicz said. "There is nothing to it. We haven't discussed anything with anyone."

In addition to his trip to Argentina and the surgery, Martinez's promotional company, Maravilla Box Promotions, is promoting its first card on Nov. 3 in Colon, Argentina.

Martinez is co-promoting the card with Lewkowicz's company Sampson Boxing and Argentina-based Best Box.

In the main event, former junior flyweight titlist Roberto Vasquez (32-5, 22 KOs) of Panama will face John Mark Apolinario (17-2-1 4 KOs) of the Philippines for an interim bantamweight world title.