Former champions SCG Muang Thong United moved into the top four with a 3-0 home victory over Sukhothai in their Thai League 1 encounter on Sunday night.
The Kirins are enjoying a timely recovery after a stuttering start and, on 31 points, they are now only one behind arch-rivals Buriram United, who suffered a 1-0 defeat at home to BG Pathum United on Saturday night.
Unbeaten Pathum United are the league leaders with 53 points -- 13 more than second-placed Port -- while defending champions Chiang Rai United are one point adrift of Muang Thong after their shock 1-0 defeat at PT Prachuap last night.
Muang Thong found the net on both sides of the break with Lucas Rocha bagging the first on 35 minutes and Derley adding to their tally 13 minutes into the second half. The Kirins' third came in injury time when Wongsakorn Chaikulthewin scored.
Prachuap were off to a good start as Ratchapol Nawanno opened the ball to Peerawat Akkrathum, who guided it into the path of charging Willen Mota to score with a header from a few yards in the 12th minute.
The Beetles' Bill Rosimar put the ball into the net with a chip over the head of Prachuap goalkeeper Kwanchai Suklom but Brazilian striker's goal was ruled offside.
The defending champions wasted their best opportunity to level the score in the 54th minute when when Prachuap defender Adnan Oranovac fouled Bill inside the box.
The referee pointed to the spot without hesitation but Bill was denied by a diving Kwanchai.
In other games last night, hosts Nakhon Ratchasima edged Suphanburi 1-0 and Trat and Chonburi played out a goalless draw in an eastern derby in which both sides lost one player each to red cards.