In the highly anticipated match at the Ulsan Munsu Football Stadium, 2012 and 2020 champions Ulsan punished some poor defending from JDT to score three goals in the first 20 minutes.
Ulsan skipper Jun Seung-hyun gave the K League 1 leaders a flying start as early as the 5th minute by beating JDT goalkeeper Syihan Hazmi with an easy tap in from a corner kick.
Ulsan, coached by Hong Myung-bo, did not have to wait long to add to JDT’s misery when Gustav Ludwigson shrugged off Matthew Davies to rifle his shot into the net in the 12th minute.
JDT’s nightmare was not over as Ludwigson swept past Davies again six minutes later in the penalty box to beat Syihan.
Ulsan were reduced to 10 men in the 36th minute when defender Kim Tae-hwan was given his marching orders after a second yellow card offence.
However, despite playing almost two-thirds of the match with 10 men, JDT failed to take advantage as Ulsan held firmly.
JDT scored a consolation goal through Bergson da Silva in the 53rd minute.
The defeat was JDT’s second in three matches after kicking off their campaign with a 1-0 defeat to Japan’s Kawasaki Frontale on Sept 19.
They beat BG Pathum from Thailand 4-2 on Oct 3 in their second group match.
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