Sorry, I didn't win Olympic gold: Wei retires after cancer battle

Ex-world number one and three-time Olympic silver medallist Lee Chong Wei announced his retirement from badminton on Thursday. "I'm sorry I didn't deliver an Olympic gold. But I know I've no regrets as I've tried my best. My very best," he wrote in a Facebook post. Wei, who fought nose cancer, revealed he is quitting over risk of its recurrence.