Sydney got off to a dream start with just minutes on the clock, Joe Lolley received the ball on the right, cut inside of Everton before seeing his shot take a deflection off Peerapat Notechaiya and fly past Patiwat Khammai.

Bangkok were only behind for 16 minutes, thanks to a wonderful Weerathep Pomphun through pass for Muhsen Al Ghassani who made no mistake in beating Harrison Devenish-Meares.

Patiwat was beaten for the second time but Bangkok were spared from going behind again when Adrian Segecic curled an effort past the Thai international but the ball went agonisingly wide to leave the tie hanging in the balance at the midway point of the return leg.

Al Ghassani continued to be a thorn in the side for Sydney, his quick movement in the 53rd minute saw the Omani forward get to the ball ahead of Devenish-Meares to lay the ball back for Mahmoud Eid, whose strike hit the Sydney keeper.

Eid didn’t have to wait long to make amends as he side footed home a minute later after Devenish-Meares decided to pass to Corey Hollman despite Bangkok players surrounding him with Weerathep intercepting the ball before squaring for his teammate.

Sydney’s hopes of a comeback were raised out of nowhere when Thitipan Puangjan was shown a second yellow card for preventing Leo Sena from taking a quick free-kick. 

This saw Sydney upping their tempo and were rewarded through a Segecic goal in the 88th minute which forced extra time.

Former Juventus midfielder Costa’s quality shone in extra time as he curled a spectacular shot from outside beyond Patiwawt to take the Australian side through to the next stage.