The Brisbane Roar have issued a public apology to their fans and kit supplier following the embattled A-League club's horror AFC Champions League loss on Tuesday night.

The Roar were upset 3-2 by unfancied Filipino outfit Ceres-Negros, who are just two weeks into preseason training.

Brisbane Roar had a horror night at QSAC and have apologised to fans and sponsors. Credit:Dave Hunt/AAP

But the real embarrassment came when Eric Bautheac was stranded on the sideline for more than five minutes without a shirt to wear after the No.22 fell off his jersey.

It left Brisbane with just 10 men on the park in comical scenes that have been slammed by all-comers on social media.