National team striker Lee Chun-soo on Sunday scored a hat trick as Ulsan Hyundai destroyed Incheon United, 5-1, in the first leg of the K-League soccer championship in Incheon.

The former member of Spain's Real Sociedad helped open the scoring as he assisted Brazilian teammate Leandro Machado on a goal in the 13th minute.

After scoring one of his own in the 37th minute, Lee showed why he is one of Asia's best at free kicks with a curving shot into the net in the 46th minute to give Ulsan a commanding 3-0 halftime lead.

Some 35,000 fans including national soccer coach Dick Advocaat watched from the stands as Ulsan took a major step forward towards its second championship.

Machado added his second in the 58th minute and Lee completed his hat track with one in the 73rd minute.

Incheon finally got on the board with a goal from its Serbian striker Dzenen Radondic in the 89th minute.

The two teams will play Saturday the second leg of the final in Ulsan.