Asian Champions League winners Seongnam Ilhwa Chunma fought back from a goal down to beat Ulsan Horang-i 3-1 in the K-League play-offs and set up a clash with Jeonbuk Motors.

Ulsan went in front in the 22nd minute when Koh Chang-hyun ran on to a through ball from Jose Ortigoza and found the back of the net but just five minutes later, Choi Sung-kuk was pulled down in the area and captain Sasa Ognenovski blasted home the penalty to level for the visitors.

Choi was involved in Seongnam's second goal midway through the second-half, feeding Dzenan Radoncic outside the area and the Montenegrin striker rifled a first-time shot past Kim Young-kwang.

With 19 minutes remaining, Mauricio Molina fired home from inside the area after good work from Radoncic.

Seongnam now face Jeonbuk on Wednesday and the winner of that game will not only move on to meet Jeju United and then potentially FC Seoul in the final, but will also book a place in the 2011 Asian Champions League.

"We were frustrated at falling behind to an early goal but the players responded well," said Seongnam coach Shin Tae-yong after the game.

"We were focused only on winning this game at Ulsan and haven't thought about Jeonbuk yet but they are a good team and we will have to prepare well if we are to beat them."