Intro:

Chinese hurdler Liu Xiang has arrived in London for the Olympic Games with doubts persisting over his fitness.

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The star of Chinese track and field, Liu Xiang, finally arrived in London on Friday after finishing his training camp in Germany.

The 2004 Olympic champion had opted to stay in Leverkusen to prepare for the 110m men's hurdles competition, claiming the climate was better.

However, Liu's coach, Sun Haiping, has revealed the cold conditions in Germany meant the 29-year-old's foot injury flared up at times, causing the coach some concern.

SOUNDBITE(Mandarin) Sun Haiping, Liu Xiang's coach

"Now the problem is the old injury on his foot starts having reaction again. Sometime everything is normal and there is no problem, but in the German training camp, the weather is better than here in London but it is also pretty chilly and rains a lot. The temperature there can be as low as around 10 degree C, so he felt sometime uncomfortable on his old injury part, sour and painful. So the problem seems still there, but we are giving him positive medical treatment. Anyway, generally speaking, his overall physical situation is alright."

The Chinese sports icon was forced to withdraw from his home game in Beijing four years ago and having pulled out from the London Diamond League before this year's Olympic there are some who believe he isn't 100% fit.

Fans will hopefully get to see Liu in action on August 6 and 7 in the 110m hurdles.