No. 2 Xu upset in table tennis worlds

World youth table tennis champion Fang Bo stunned world No. 2 Xu Xin in an all-Chinese game to reach the men's singles quarter-finals at the world championships on Friday.

Fang, who jumped to fame as he swept four titles in the 2009 youth worlds, nailed a seven-set (10-12, 7-11, 11-8, 11-2, 8-11, 11-9, 13-11) victory over left-handed Xu, who has been troubled with a muscle strain in the left shoulder.

Xu picked up the injury Thursday night as he paired with South Korean Yang Hae-un to reach the mixed doubles final.

Xu asked for an injury break while trailing 1-4 in the deciding set and returned to tie 10-10, 11-11 before the 23-year-old teammate took the game.

Earlier, the world top-ranked Ma Long played an aggressive topspin game to beat the best defensive player in the world.

The 26-year-old Chinese, who needs a world singles title to prove his ranking, beat 17th-ranked South Korean Joo Sae-hyuk, 11-4, 11-3, 11-9, 10-12, 11-6.

Ma, 2012 World Cup winner, has been notoriously under-achieving in Olympics and world championships, overshadowed by teammate Zhang Jike, who has completed a "grand slam" of Olympics, world championships and World Cup singles titles.

Zhang, aiming for his third straight world singles crown in Suzhou, takes on Belarus veteran Vladimir Samosonov in the afternoon for a quarter-final berth.

Joo, who plays a chop-and-attack game, had trouble in responding to firepower from Ma and lost the first two sets easily.

As he put more spin to his chops and distracted his rival with counter-attacks, Joo narrowly lost the third set and won the fourth.

Using powerful forehand attacks coupled with placement shots, Ma didn't give a chance to an already jaded Joo, wrapping up in five sets.

Ma will vie for a semifinal spot with the winner between Hong Kong player Tang Peng and South Korea's Lee Sang-su. Enditem