The CTA-OPEN, the most influential tennis contest for amateurs in China, is to be held in Zhangjiagang, East China's Jiangsu province on May 13.

The event has attracted many athletes from Shanghai, Nanjing and other surrounding areas since it was first held in Zhangjiagang in 2011.

Athletes at the 2017 CTA-OPEN Competition held in Zhangjiagang, East China's Shandong province. [Photo/zjgonline.com.cn]

An athlete show her skills at the 2017 CTA-OPEN Competition held in Zhangjiagang, East China's Shandong province. [Photo/zjgonline.com.cn]