MANILA, Philippines -- Manny Pacquiao has decided to leave for Baguio only this Sunday, with his training camp to officially open the next day, followed by a sparring session Tuesday. .............The sparring partners who arrived with Roach, Junior middleweight Michael Medina and Glen tapia -said they were eager to spar with Pacquiao and get him in shape for the WBC super welterweight duel with Antonio Margarito.