'I didn't adjust': Djokovic dumped out of Shanghai at first hurdle by Hurkacz
Home hero Zheng powers into Beijing semis before Mertens stuns Swiatek
Tennis Tracker: Mertens stuns Swiatek in Beijing quarters, Djokovic beaten by Hurkacz
Mirra Andreeva defeats compatriot Ekaterina Alexandrova to book Beijing semi-final spot
