In a 169-minute battle of endurance, engaging rallies and earned points, qualifer Nam Hyun-woo ended his fellow South Korean Kwon Soon-woo’s amazing two-week run by knocking out the teenager in the second round of the $10,000 ITF Futures presented as the 6th Cham Prasidh Open at the National Training Center yesterday.

With back-to-back titles behind him, Kwon seemed well on course for another whopping week when he handled with great felicity a tough first set tie-break, but early in the second set Nam clawed his way back to eventually complete a 6-7, 6-3, 6-4 victory to make the quarterfinals.

Kwon had some stunning comebacks in his 11-match winning streak but against Nam it was a different story.

Nam got into the fighting groove after that crucial break in the eighth game of the second set, and an early break in the third proved decisive for the 24-year-old, who served seven aces to his rival’s two.

Unlike most of his previous matches, Kwon struggled with his serves, accounting for less than 50 per cent on the service games won, which hugely impacted his free-flowing game.

Three seeded players fell by the way side, including third seed Liang Chi Huang of Chinese Taipei, who was squarely beaten 6-0, 6-3 by Japan’s Masato Shiga. German contenders Mathias Wunner and Tom Schonenberg took out two other seeded players.

While Schonenberg was declared the winner after taking the first set at 7-5 since his rival, the sixth seeded Richard Gabb of Great Britain, chose to retire from the contest, Wunner slid past seventh seed Niesten Miliaan of the Netherlands, 6-3, 6-0.

The top two ranked players in the main draw, Chen Ti of Chinese Taipei and Yannick Jankovits of France went through after straight set wins. Chen Ti swept past Kim Seong-kwan 6-1, 6-2, but Yankovits had to stretch himself, notably in the second set, to get the better of Cheng Yu Yu of Chinese Taipei 6-1, 7-6.

In other second round matches, fifth seed Kim Cheong-eui of South Korea got past Hoang Nam Ly of Vietnam 6-2,6-4, while fellow Korean Cho Min-hyeok defeated Jeson Patrombon of the Philippines 6-4, 6-3.