If Rogen Ladon and Irish Magno need any reminders about how difficult the last hurdle to a gold medal will be, they only need to look within their team. Late Friday night, Olympic silver medalist Nesthy Petecio lost in a stunning upset to Thi Linh Tran of Vietnam in the semifinal of the 57-60 kilogram women’s boxing in the 31st Southeast Asian (SEA) Games at Bac Ninh Stadium. But there may have been more to the defeat of the second best featherweight in the Tokyo Games, though. “That decision on Josie and Nesthy, I’d like to think the judges were persuaded by the shouting of the crowd but that…