Despite playing away, it was Sri Lanka who were the quicker to settle as they kept Cambodia pinned deep in their own half.

After several missed attempts, Sri Lanka finally broke the deadlock in the 37th minute through Oliver Kelaart, whose stinger from just outside the box proved too much for Cambodia goalkeeper Vireak Dara.

Going behind prompted Cambodia to increase their tempo and the Southeast Asian side were level five minutes into the second half through Nhean Sosidan.

Neither side was able to find a way through in the remaining minutes of the second half, sending the game into an additional 30 minutes.

Cambodia took a firm grip on the game and their positive approach paid rich dividends, with Sos Suhana scoring in the 98th minute.

The hosts continued to dictate the pace but were shocked in stoppage time when Claudio Kammerknecht was the quickest to react when the ball rebounded off the crossbar to knock it into the back of the net.

That took the game to penalties with Perera emerging the hero as Sri Lanka advanced.