The former West Ham United midfielder, however, is adamant more is to come from his charges and stressing that Bangladesh will not be resting on their laurels despite their recent successes.

“I want to ensure we learn some lessons from this tournament,” said Butler. “It is really important to go from here irrespective of the outcome against Korea (Republic).

“We’ve got everything to play for. We will give our best shot (at the Finals). We have really learnt a few lessons to do things in the right way, we are learning.”

Sunday’s 6-1 defeat to Korea Republic cast a cloud on Bangladesh’s qualification hopes but their victories over Laos (3-1) and Timor-Leste (8-0) - aided by results elsewhere - ultimately proved enough for Bangladesh to advance as one of the three best second-placed sides.

With qualification secured, Butler’s focus now will be to prepare his players for what will surely be a titanic continental challenge and given his high standards, the opposition will have to tread carefully against Bangladesh.