International Tennis Federation (ITF) released new rankings on Tuesday that place Vietnam's No.1 young player Nguyen Hoang Thien up in international ranking from 238^th to 144^th.

The 16-year-old Thien made the leap thanks mostly to his impressive performances at the China Junior 15- Xiamai [Under-18 ITF Grade 2] contest where he finished second on Sunday, September 25.

On Tuesday, Thien took a dramatic 7-5, 7-6 win over Swede player Fred Simonsson, ranked 161^st, in the first round of the China Junior 16- Beijing 2011 [U18 ITF Grade 2].

Thien will next clash with the second-seeded Chinese player Gao Xin, ranked 71^st on the latest released ITF juniors rankings.