Hai Yen Pham's goal in the third minute of extra-time gave Vietnam their sixth Sea Games gold medal, one more than Thailand with the two nations the only wons to have won the regional title.

Earlier, Myanmar took the bronze after coming from behind to defeat hosts Philippines 2-1 in the play-off.

Indonesia needed extra time to overcome a fighting Myanmar 4-2 while Vietnam strolled to a 4-0 win over surprise semi-finalists Cambodia.

Whoever wins the gold medal in Tuesday's final will end a long wait - Indonesia were last champions in 1991 while Vietnam - then South Vietnam - won the inaugural edition in 1959.

Defending champions Vietnam struck twice in the second half to subdue host nation Philippines 2-0 while Thailand edged Myanmar 1-0 in their semi-final.

It will be a second meeting between the two teams in the 2019 Sea Games, having settled for a 1-1 draw in their Group B encounter on November 26.

Indonesia defeated Laos to take second spot in the group on 12 points, one behind Vietnam but, crucially, two more than Thailand.

Vietnam will play Cambodia in the semi-finals while Indonesia will meet Group A winners Myanmar on Saturday.

Cambodia, having never won a medal in men's football at the SEA Games, claimed their spot in the knockout stage as Group A runners-up with seven points to their name, while it was a heartbreak ending for Philippines, who were edged out on goal difference despite their 3-1 win.

Myanmar defeated Malaysia 5-0 in Group A while Thailand beat Indonesia 5-1 in Group B, with both teams finishing runners-up in their respective groups.

Thailand, the 2017 silver medallists, will face Group A winners Philippines in the semi-finals on Thursday with defending champions Vietnam to play Myanmar.

Vietnam - who played to a 1-1 draw with Thailand in their opening match - defeated Indonesia 6-0 in Group B while Philippines cruised 5-0 past Malaysia in Group A.

Indonesia's hopes now hinge on defeating Thailand on Monday while Malaysia will have to defeat Myanmar.