China's star hurdler Liu Xiang described his London Olympics "most relaxed" in an interview with TV media on Friday.

"Compared with the Olympics in Athens and Beijing, I feel the most relaxed in London," Liu said before the opening ceremony of the 30th Olympics.

"I have different feelings in attending the Olympics at different places," he said, "In 2004 Athens Olympics, I wanted to go into the eighth one while I felt more pressure in 2008 in my own country."

"I will be a success as long as I can enter the finals in London Olympics," he said.

The men's 110m hurdles in London Olympics will be held from August 7 and 8.