SINGAPORE - World No. 4 Feng Tianwei is through to the last eight of the World Table Tennis Championships, after a hard-fought win against a home favourite Kristin Silbereisen.

The Singaporean beat her German opponent 8-11, 11-5, 11-7, 9-11, 11-7, 11-9 on Friday (June 2) to earn a place in the quarter-finals, where she will meet Japan's world No. 8 Miu Hirano.

Feng is also guaranteed at least a bronze medal in the women's doubles, after partnering former team-mate Yu Mengyu to beat a Taiwanese pair in the quarter-finals. The duo beat Chen Szu-yu and Cheng I-ching 11-9, 6-11, 11-9, 12-10, 8-11, 11-8 in Dusseldorf, Germany, where the event is ongoing.

The pair will play China's Zhu Yuling and Chen Meng in the semi-finals next.

Losing semi-finalists are awarded a bronze at the tournament.

Feng's third match of the day will be against Japan's 17-year-old prodigy Hirano, who sensationally won the Women's World Cup last year and the Asian Championships this year.

Their quarter-final is slated to take place around 9.45pm (Singapore time) on Friday.

Said Feng shortly after her win against Silbereisen: "This was a tough match. My opponent had the home-ground advantage and benefited from quite a few lucky shots. But I had ample preparation.

"It will only get harder from here. I'll have to treat my match against Hirano as if I were playing a Chinese player.