By Gabriel Tan in Bangkok
The War Elephants booked their place in the final Southeast Asia's premier international tournament on Thursday evening after recording a 2-0 win over Malaysia at the Suphachalasai Stadium, to see off the defending champions 3-1 on aggregate in their semi-final clash.
Winfried Schafer's chargeswill next meet Singapore, who themselves saw off Philippines in the other last-four encounter, with the first leg to take place at the Jalan Besar Stadium next Wednesday.
Both sides face off looking to win the Suzuki Cup for a record fourth time but while the Lions' last victory came back in 2007, Thailand have not tasted success in the tournament for ten years, something Teerasil is eager to change this year.
"I'm very happy to be going to the final," he told ESPNSTAR.com.
"Everybody has been waiting for a long time [to win the competition] and it's up to us to change that now."
The Muangthong United star, who is currently the tournament's top scorer with five goals, does however admit they will need to get a good result in Wednesday's first leg to bring back to Bangkok.
"Thailand are very strong at home," Teerasil added.
"I think the first match in Singapore is very important. We need to come back with a good result."
Although Thursday's game against Harimau Malaya turned out to be a convincing win for the War Elephants, it was not without controversy as the visitors were reduced to ten men after Fadhli Shas received a harsh second yellow for squaring up to Datsakorn, who also received a booking for his part in the incident.
Nonetheless, the midfield general insists referee Lee Min-hu made the right call, and believes his side were deserving winners on the night.
"Yes, I think the red card changed the game," Datsakorn said. "But it was the right decision.
"I'm surprised that Malaysia only had one shot on goal. It was easy for Thailand in the end."
The 28-year-old, who earned his first cap in 2001, was part of the side that lost out to Singapore in the 2007 final, and is determined to make amends for that defeat and a decade of misery in Thai football.
"[On Thursday] many people came out to support us and we played very well," he added. "We want to repay them.
"I want to win the final against Singapore. I want to lift the Suzuki Cup."
Following next Wednesday's first leg, both sides will meet again three days later at the Suphachalasai Stadium for the return encounter.