At Wembley Arena, fans jeered as the women's doubles match between China's Yu Yang and Wang Xiaoli and South Koreans Jung Kyung-eun and Kim Ha-na saw repeated errors.
Earlier this month, Beijing called on its nation's tourists to improve their behavior, with Vice Premier WangYang stating it was important to project a good image of Chinese tourists.
Mr. Yang and Ms. Wang were the latest witnesses Samsung called as it attempts to both prove that Apple infringed its patents and defend against the Cupertino company's claims that it had done the same.