The Western Sydney Wanderers will take their first steps in the Asian Champions League without top striker Tomi Juric, who has been ruled out with a hamstring injury.

Juric came on at half-time during Saturday night’s 2-0 win over Perth Glory and scored the decisive goal before picking up the strain at the end of the match.

Fit to play: Shinji Ono has been identified as the danger man by Ulsan Hyundai in the Wanderers' opening clash of the ACL. Credit:Getty Images

The 22-year old’s absence is a considerable blow as the Wanderers seek success in their first foray into Asian football, against Korean side Ulsan Hyundai at home on Wednesday night.

“It’s a little disappointing that he got a little niggle on the weekend,” coach Tony Popovic said on Tuesday. “After he came off on the weekend, I knew he was out immediately. The medical staff is pretty optimistic it will be a short-term injury. Whether that’s [this] weekend or not remains to be seen, but if we’re talking about possibilities [of playing] for this weekend [against Newcastle at home], that’s a good sign.”