Adelaide United are stung by their 1-0 away loss to Pohang Steelers in the Asian Champions League soccer, acting coach Luciano Trani says.
The Reds left South Korea without a point and with a hamstring injury to playmaker Dario Vidosic.
Trani coached Adelaide to their dull defeat on Tuesday night, as John Kosmina went about collecting the recognised coaching certificate for the Asian League.
Trani said the Reds players were exposed to a new level against the powerful Korean club.
"The boys now know what is required," Trani said as the Steelers joined them on top of Group E with six points.
"That is a real motivation to go back home and give ourselves a chance to make amends for what happened."
Vidosic limped off against the Steelers and is in doubt for Adelaide's next fixture, home against Pohang on April 18.
The Reds then host Uzbekistan's Bunyodkor on May 2 before a last away group match against Japan's Gamba Osaka on May 16.
Trani praised Adelaide's defensive spirit in the loss to Pohang, but the Reds created few scoring chances.
"It was one of those difficult games where we defended as well as we expected," Trani said.
"And against an opposition like that, it's a credit to the boys.
"Technically, all of the Pohang players are sound - if you give them too much space, they've got the ability to carve you open very quickly.
"And that's what you get in the Champions League. You have got the chance to come up against footballing nations that have technically very sound footballers."