Al Ghassani netted in the second and 33rd minutes as Totchtawan Sripan’s side extended their advantage from last week’s first leg before Walter Scott gave the home side a glimmer of hope with a strike from distance four minutes before the interval.

Callum Talbot hit the post for Mile Sterjovski’s side, who pushed in vain for a way back into the game and Harry Sawyer’s 92nd minute goal was not enough to deny Bangkok United a last eight meeting with Singapore's Tampines Rovers FC next month.