体坛英语新闻：China's Liu Xiang unsure about London Olympics

Ryan Braithwaite of Barbados, the surprise winner in Berlin last year, continued his disappointing start to the season, clattering a succession of hurdles and failing to complete the race.

Liu started well but faded quickly. Oliver finished nearly five meters clear of second placed Shi as Liu completed the podium.

"I think it is a good run tonight," Liu said after the race. "I feel great even though I lost to my teammate Shi Dongpeng for the first time in my career. Shi registered a season best."

Liu said he had a fresh injury to his feet and failed to have had normal training.

"I have no reason to blame," Liu said. "I could not have intensive training. As a result I could not register good result in competition."

Liu, who jumped to fame by winning the gold medal at the 2004 Athens Olympic Games, is not confident of his future at the London Olympics.

"The London Olympics is too far for me," he said. "I must start from the very beginning. I am not sure about myself now."