titleholders at the time: Timothy Bradley, Devon Alexander or Amir Khan, all of whom were fighting on HBO. Márquez vs. Katsidis A few weeks after the Juan Díaz fight, Golden Boy Promotions officially announced that Márquez would defend his lightweight titles against mandatory challenger, WBO Interim Champion Michael Katsidis, on November 27, 2010, at the MGM Grand in Las Vegas and that the bout would be televised live on HBO Championship Boxing. During the official weigh in for their 135 lb bout, Márquez came in at 134 pounds, while Katsidis came in on the limit of 135 pounds. Despite being knocked down in the third round, Márquez came back and defeated Katsidis by a ninth-round TKO to retain the lightweight belts. At the time of the stoppage, the Mexican boxer was ahead on all the scorecards by 77–74, 78–74 and 76–75. During the post fight interview, he once again expressed his interest in a third fight with Manny Pacquiao. Márquez is the oldest world champion in the history of the lightweight division. On January 4, the WBA no longer recognized Márquez as their Super Champion due to going 18 months without fighting a mandatory challenger as required by the organization's rules. Fernando Beltrán of Zanfer Promotions stated that the WBA's decision had no validity and that he would immediately send them a letter, since the deadline of May 2012 for the mandatory defense had not expired, and Márquez paid sanctioning fees to the WBA even for the last few non-lightweight fights. On January 26, Márquez was stripped of his WBO title, as he was considered to be moving up to the welterweight division. The WBO promoted Interim titleholder Ricky Burns to full champion status. The Ring magazine stripped of him of their championship on April 17. Light welterweight Márquez moved up to light welterweight division to fight Likar Ramos on July 16, 2011, at Mexico. It was considered a tune-up fight before his third battle with Manny Pacquiao. The fight only lasted one round with Márquez winning by technical knockout. Many experts queried whether Ramos was hired to 'take a dive' (have the contest fixed or lose it on purpose) in order for Márquez to look good. Return to welterweight Márquez vs. Pacquiao III Márquez attracted controversy by hiring strength and conditioning coach Angel "Memo Heredia" Hernandez, who had supplied performance-enhancing drugs to sprinters Marion Jones and Tim Montgomery in