Thailand No.1 Danai Udomchoke will take on South Korea's Lim Yong-Kyu in the opening singles of the Davis Cup Asia/Oceania Zone Group 1 today.
Danai Udomchoke, left, and Lim Yong-Kyu.
Following yesterday's draw, Thailand's Warit Sornbutnark will face South Korea's top player Chung Hyeon in today's other singles at the Tennis Development Centre, Muang Thong Thani.
In tomorrow's doubles, Thai twins Sonchat and Sanchai Ratiwatana will meet Nam Ji-Sung and Song Min-Kyu.
Thailand captain Paradorn Srichaphan said he expected his team to get at least one point from Danai on the first day.
Danai and Lim are 1-1 in their head-to-head record.
Warit said he did not feel under pressure because the opponent is ranked higher.
Thailand are looking to level the series against South Korea who are 2-1 in their head-to-head record.
Meanwhile, Switzerland's hold on the Davis Cup is under real threat this weekend when they travel to Liege to take on Belgium in one of eight World Group first-round ties.
Powered by Roger Federer and Stan Wawrinka, the Swiss won the trophy for the first time last November, defeating France in the final in Lille.
But neither Federer, nor Wawrinka have made themselves available for this weekend, and instead the Swiss will have to depend on world No.292 Yann Marti and No.344 Henri Laaksonen.
On the other side of the net, the Belgians have 21st ranked David Goffin and the highly-experienced Steve Darcis to fall back on.
Team captain Severin Luthi agreed that the odds were stacked against the Swiss "but we will see what happens on the court and we will battle to the end."
World No.1 Novak Djokovic will spearhead Serbia's bid for a second Davis Cup triumph after that of 2010 and, with the injured Marin Cilic unable to play for Croatia, he will be confident of his team advancing to the quarter-finals.
The Czech Republic also enjoy home advantage against Australia but will be without top player Tomas Berdych, who has made himself unavailable as he continues with his quest to win a first Grand Slam title.
The Australians, who last won the Davis Cup in 2003, had looked set to start as favourites, but they have lost to injury up-and-coming Nick Kyrgios and will look once again to veteran campaigner Lleyton Hewitt alongside the unpredictable Bernard Tomic.
If Australia's wait for another Davis Cup crown rankles with them, it comes nothing near the agony of a British team that last took the coveted team trophy in 1936 with Fred Perry to the fore.
But at least they are back in the World Group and have a winnable tie in Glasgow against the United States to start with.