Thailand have been drawn to face Lebanon in their first 49th King's Cup match with Iraq taking on India in the other opening day game in Chiang Mai next month.
The official draw for the prestigious tournament was held at the Chiang Mai Provincial Administrative Organisation hall yesterday.
Chiang Mai governor Nirat Pongsiritavon presided over the draw, which was attended by Thailand team manager Nualphan Lamsam and coach Mano Polking.
The first two games of the tournament will be held on Sept 7 with the final and third-place play-off being scheduled for Sept 10 at Chiang Mai's 700th Anniversary Stadium.
The winners of the first games meet in the final and the losers face off in the third-place play-off.
All matches will be televised live on Thai Rath TV and AIS Play.
After the draw, Nualphan admitted that this year's King's Cup would not be an easy fixture for the War Elephants.
"The three other teams participating in the event have higher world rankings than us. They are all in the top 100," she said.
"The game against Lebanon will be a difficult one but we are ready to fight and will do our best to qualify for the final.
"Coach Mano and his staff have already done their homework and we will be selecting the best team possible."
The team will start training on Aug 30 and move their camp to Chiang Mai on Sept 4.
Meanwhile, the Thai U23 team will face Myanmar in the opening match of the AFF U23 Championship at Rayong Stadium today.
The event, sanctioned by the Asean Football Federation, will end on Aug 26. There are 10 Asean countries participating in the tournament.
The Thai U23 team have been drawn in Group A with Myanmar, Brunei and Cambodia, while Group B consists of Timor Leste, Malaysia and Indonesia and Group C has Vietnam, the Philippines and Laos.
The Thais, coached by Issara Sritaro, play Myanmar at 8pm with Cambodia facing Brunei at 4pm.