Port rallied from two goals down to draw 2-2 with Police Tero in Thai League 1 last night.
Police raced to a 2-0 lead at half-time with goals from Chanukan Karin in the 36th minute and Chalermsak Aukkee just before the interval at PAT Stadium.
But Port regrouped in the second half and earned a point with two goals in five minutes by Pakorn Prempak (73) and Teerasak Poeiphimai (78).
In today's action, leaders Buriram United will try to maintain their unbeaten record when they travel to Pathum United.
Although the Thunder Castle hold a 11-point advantage, they want to lift the trophy without defeat. They also aim to win all three major domestic competitions for a second year in a row.