
The two-time SEA Games champion jumped four places, up from No 332last week, to his new mark, which is the best position of a Vietnamese tennisplayer in the world.
The former Wimbledon doubles boy's champion is now the best playerin the Southeast Asian region, leaving the nearest player Kasidit Samrej ofThailand, far behind at No 609.
Nam is currently playing at the Challenger Bangkok Open 1 inNonthaburi province, about 16km from Bangkok. On August 23, he defeatedAustralian Dayne Kelly 6-4, 7-6 (4) in the first round after two hours and fiveminutes.
Nam will next face off against No 8 seed Illya Marchenko ofUkraine, who notably made it to world No 49 in 2016.
Marchenko is world No 308, taller and heavier but nine years olderthan Nam.
To date, Nam has shown his remarkable performance with a streak of24 wins before losing in the final of the M15 Kuching event in Malaysia inJune.
Earlier this month, he played a crucial role in Vietnam'ssecond-place finish at the Davis Cup Asia/Oceania Group III event and promotionto Group II next year.
The Bangkok Open, part of the ATP Challenger Tour, will close onAugust 28.
Nam will remain in Thailand for the Nonthaburi 2 event at the sameplace from August 29 to September 4.
He then will fly home to compete in two M25 Tay Ninh in September./.