Thai League 1 champions BG Pathum United failed to extend their winning streak when they were held to a scoreless draw by hosts Nakhon Ratchasima.
The Rabbits dominated for long periods but failed to break Nakhon Ratchasima's stubborn defence.
The result ended Pathum's winning run at five games while the Swat Cats could not extend their own streak to four wins.
Nakhon Ratchasima's Pisan Dorkmaikaew had an outstanding game, making several fine saves to deny Teerasil Dangda and Sarach Yooyen.
In another game, hosts Prachuap, who were reduced to 10 men, lost 2-1 to Chonburi.
On Tuesday night, Buriram could only manage a scoreless home draw against promoted side Nongbua Pitchaya.
It was the Thunder Castle's second consecutive setback after losing to Pathum at the weekend.
"We are disappointed. We had several chances but could not score. Our players look sad because the result was not what we had expected," said Buriram coach Alexandre Gama.
In Thursday's action, Port will try to return to winning ways when they host Ratchaburi.
Port have suffered two successive defeats and coach Dusit Chalermsan could be in big trouble with another setback at home.
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