By ESPNSTAR.com staff
Having lost to the Sharks 4-3 when both sides met at the Thunder Castle Stadium back in June, Buriram entered the game looking not only to avenge that loss but also keep alive their ailing title hopes.
However, things got off to a bad start in the 12th minute when Kazuto Kushida fired Chonburi ahead after Thiago Cunha had found him inside the area with a clever pass.
A minute before the half-hour mark, sloppy play by Buriram centre-back Yves Ekwalla Herman saw him gave possession away inside his own half, allowing Noppanon Kachaplayuk to make his way down the right before laying the ball to Kushida, who doubled his tally with a 25-yard strike.
Ten minutes after the break, the contest was all but over when Thiago unleashed a left-footed strike past a hapless Sivaruck Tedsungnoen, but Buriram then threatened to make an unlikely comeback when Ekwalla made amends for his earlier error by scoring two headers in the final 20 minutes.
Nonetheless, Chonburi were not to be denied and went on to wrap up all three points when Fode Bangaly Diakite added a fourth in the 82nd minute, before Surat Sukha added to Buriram's misery when he received a straight red two minutes from the end.
The result means the Thunder Castle are now eight points behind second-placed Chonburi and a massive 15 behind leaders Muangthong United, who have a game in hand.
Fourth-placed BEC Tero Sasana are also now just four points behind them after recording a 4-2 win over Chainat.
Brazilian striker Cleiton Silva opened the scoring for the Fire Dragons in the 17th minute but Yuttajak Khonchan equalised four minutes later, although parity was only restored for a minute as the hosts raced up the other end and reclaimed the lead through Arzu.
Silva then grabbed another in the 32nd minute before completing his hat-trick five minutes after the break, although Chainat managed a late consolation when they netted through Phuwadon Suwannachat in the 80th minute.
Relegation-threatened Police United picked up a priceless three points after Thai international Tana Chanabut scored in the 77th minute to give them a 1-0 triumph over Osotspa Saraburi, which was enough to see them move out of the relegation zone until Sunday's matches, while Bangkok Glass were held to a 0-0 draw at Thai Port.
Finally, Kengne Ludovick's brace was enough to give Pattaya United an impressive 2-1 victory over Army United in a bad-tempered clash at the Nongprue Stadium.
Ludovick fired the Dolphins into the lead a minute before the half-hour mark but Jakrapong Somboon equalised for Army in the 57th minute, before the hosts were reduced to ten men when Rangsarit Sutthisa received his marching orders.
Despite being a man down, Pattaya went on to score what proved to be the winner 11 minutes from time when Ludovick grabbed his second, before the visitors themselves had a man sent off when Pavarit Saensook received a second yellow.
Saturday's Thai Premier League Results
Thai Port 0-0 Bangkok Glass
BEC Tero Sasana 4-2 Chainat
Pattaya United 2-1 Army United
Chonburi 4-2 Buriram United
Police United 1-0 Osotspa Saraburi