South Korea's Ulsan Hyundai will take a 1-0 lead into the second leg of their Asian Champions League semi-final against Yokohama F Marinos in Japan next week after Hong Myung-bo's hosts carved out a slender advantage on Wednesday.

Lee Dong-gyeong struck in the 19th minute against the Harry Kewell-coached J.League outfit, who are appearing in the semi-finals of the continental championship for the first time, and the teams will meet again in Yokohama next Wednesday.