(NEW YORK) — Fears are growing about the safety and whereabouts of a Chinese tennis star, who has remained unheard from since she accused a former Chinese official of sexual assault. Peng Shuai, 35, a former No. 1 globally ranked tennis player, wrote in her verified Weibo microblog about what she decribed as the years-long affair she had with former vice premier Zhang Gaoli, and how she had been allegedly sexually assaulted by him.…