The game was a rearranged fixture after they initially met on Saturday before play was suspended at half-time due to rain with the scores level at 1-1.

Thailand made early headway when Tawan Sripan fired home a superb long-range effort in the eighth minute.

The second goal didn't arrive until 21 minutes before the end when Sutee Suksomkit despatched a penalty to ensure the victory.

Co-hosts Thailand kick off their AFC Asian Cup campaign against Iraq in Group A on Saturday while Qatar will meet Japan in Group B on July 9.