Serena sina sports news Beijing time on October 17 According to the latest news WTA, the world's second, queen of tennis serena Williams announced that due to a right shoulder injury will exit the WTA Singapore season this year, it will be the second year in a row, the United States will miss the competition. Previous season's list of eight people have been confirmed, and seven other people is bell, haller, card - pulis Eva, A - Vance rudd card, jose guru...