China's Zheng toppled by qualifier in WTA 500 Berlin Open

BERLIN, June 20 (Xinhua) -- China's Zheng Qinwen was stunned by qualifier Katerina Siniakova of the Czech Republic in the second round of the WTA 500 Berlin Open here on Thursday.

Originally scheduled for Wednesday, the match had been postponed due to slippery venue when Siniakova led 5-3 in the first set.

As the match continued on Thursday, Siniakova maintained her momentum, outplaying Zheng 6-4, 6-4 to