Ukraine’s world champion Vasyl Lomachenko won a second successive Olympic gold medal Sunday when he added the lightweight title to the featherweight crown he captured in Beijing four years ago. Lomachenko, 24, who won the lightweight world title in Baku last year, eased to a 19-9 win over South Korea’s Han Soon-Chul in Sunday’s final. “I wouldn’t differentiate between the two medals and how much they mean to me,” said Lomachenko, comparing his London gold to his Beijing victory. “The first one I was an unknown quantity, but here I was the defending champion and was the scalp everyone wanted.”