China's two-time speed skating world champion and Olympic medal hopeful Yu Jing might miss the upcoming Sochi Games due to reoccurrence of an old injury, said a senior sports official here Wednesday.

"She had some problem with her old waist injury and it would be difficult for her to take part in the Sochi Games," said Zhao Yinggang, deputy secretary general of the Chinese Sports Delegation to Sochi. "We will soon make the final decision."

Yu, who had claimed the gold medal of the sprint combination at the World Sprint Championships in 2012 and 2014, was abound to arrive in Sochi Wednesday morning with teammate Zhang Hong, but now she had to stay in Beijing for final examination.

Yu, a former world record holder of the women's 500m, was considered a medal contender in the women's 500m race at the Sochi Games, which also feature reigning world No. 1 and world record holder Lee Sang-Hwa of South Korea, Vancouver Olympic silver medalist Jenny Wolf from Germany and Vancouver Olympic bronze medalist Wang Beixing of China.

"No matter what happens, we have to face it. The pressure is always there," Wang told Xinhua after a training session on Wednesday. "I'll just focus on my training and preparation for the Games."

"It's my third Olympic Games and I'm in good shape now. Hopefully I can make good use of my experience and perform to my best standard in the race," added Wang.

The speed skating competitions of the Sochi Games will kick off on Saturday with the women's 500m event scheduled for Tuesday.