The Thai Davis Cup team will earn a million baht bonus if they beat Australia in this weekend's Asia/Oceania Zone Group I clash.
The Thai team will be led by Danai Udomchoke with Sonchat and Sanchai Ratiwatana, Kittipong Vachiramanowong and Peerakiat Siriruethaiwattana.
Thanakorn Srichaphan is the team captain while his brother Paradorn, who cannot play because of an injured wrist, will be the assistant coach.
The Australian team is led by Lleyton Hewitt supported by Carsten Ball, Chris Guccione and Brydan Klein.
The winning team will meet either India or Taiwan in May.
Thai team manager Atat Nana said the players were looking forward to the event, especially as doubles pair Sonchat and Sanchai won a doubles title in Australia last week.
The match will be held at the National Tennis Development Centre, Muang Thong Thani from Friday until Sunday.
Lawn Tennis Association of Thailand (LTAT) offers 1,500 free tickets for fans on their website.
(Via Bangkok Post; Image via LTAT website)