Thai pair Tamarine Tanasugarn and Luksika Kumkhum won the decisive doubles against Galina Voskoboeva and Yaroslava Shvedova 6-4 7-6 (7-3) after the two nations were tied at 1-1 in the singles rubbers.
The Kingdom’s squad fell 0-1 at the beginning when Thai No 2 and world no 225 Noppawan Lertcheewakarn went down to the 127th-ranked Yulia Putintseva 6-4 6-3. But Thai No 1 Luksika levelled the tie when she upset world No 79 Shvedova 0-6 6-4 6-1.
Thailand finished atop Pool A and were to meet Pool B winners Uzbekistan in yesterday’s play-off. The wining team will be promoted to the World Group Play-off in April.