Ly Hoang Nam became the first Vietnamese to win the tennis title at the Asian Youth Games in Nanjing, China on Friday, while Nguyen Thi Anh Vien took the gold medal in the girls' 50m backstroke event.
Nam's and Vien's victories gave Vietnam its fourth and fifth gold medals at the second edition of the regional youth sports competition.
Vien,16, finished first with a time of 29.26 seconds, followed by second-placed South Korean Im Dasol, who finished the race in 29.47 seconds.
It was Vien's third gold medal at the event. She won the 200m backstroke and 200m medley swimming events on Wednesday and Thursday respectively.
Meanwhile, underdog Nam, also 16, came back from a set down to beat second-seeded Jurence Zosimo Mendoza (Philippines) 6-7, 7-5, 7-5.
Nam is currently ranked 140th by the International Tennis Federation (ITF) while Mendoza is ranked 88th.
In the first set, the match see-sawed until the score was 6-6; Mendoza won the tie-break 7-4.
The drama continued in the second and third sets, in which Nam prevailed 7-5, 7-5.
Nam's win showed the funding of his recent training trip in the USA and other earlier international competitions were wise investments.
Nam's coach Tran Duc Quynh said Nam is making steady progress and will build a bright future for Vietnam's tennis growth if further investments are made.
The Vietnamese sports delegation won a total five gold, four silver and two bronze medals to finish in seventh place at Asian Youth Games that ended on Friday.
China won the medal tally with 45 gold medals, followed by South Korea with 22 gold medals and Japan with seven gold medals.