A Roar loss will put their chances of progression from the group stages in doubt, but they face a tough ask on their travels to Ulsan
Both Ulsan Hyundai and Brisbane Roar carry solid domestic form into their AFC Champions League meeting on Wednesday. Their form in continental competition, however, is rather more diverse.
The K-League outfit could strike a dagger blow to the heart of their A-League visitors with victory at Munsu Cup Stadium, putting six points between them and the Roar if they are successful at home.
The Roar - with just one point to their names in two Group F matches - know how crucial a victory is to their campaign, and at least come into Wednesday's match in good form.
A thoroughly deserved 2-0 win in the first leg of their major semi-final with the Central Coast Mariners on Friday has put them in sight of a second-consecutive A-League grand final at home.
Ulsan, meanwhile, started their K-League campaign on fire, picking up all nine points on offer in their first three games.
They are fourth following a loss and a draw in their two most recent domestic fixtures, and trail Group F leaders FC Tokyo in the ACL by virtue only of goal difference after a win and a draw.
There are no fresh injury concerns for the Roar after they rested a host of players including Thomas Broich, Michael Theoklitos, Matt Smith and Mitch Nichols for their final game of the regular season against Gold Coast United.
Mohamed Adnan is suspended, however, perhaps paving the way for Matthew Jurman to replace him in defence.
Defender Kang Min-soo and midfielder Lee Ho miss for the same reasons for Ulsan.
German playmaker Thomas Broich looms as the Roar's key man, while Brisbane coach Ange Postecoglou will have to be wary of Ulsan's South Korea international forward Lee Keun-Ho.
The former Gamba Osaka forward has scored four times in five league matches, having found