British number one Kyle Edmund has been beaten by a wildcard player at the China Open - his fifth straight defeat.
Edmund, the world number 34, was defeated 6-4 3-6 7-6 (7-5) in Beijing by Zhizhen Zhang, who is ranked 213.
Dan Evans beat another Chinese player Zhe Li 6-3 6-4, while Cameron Norrie was 7-6 (7-5) 1-0 up when opponent Cristian Garin of Chile retired.
Norrie could play Andy Murray in the second round, if the Scot overcomes Italian Matteo Berrettini on Tuesday.
Edmund has not won a match since beating Australian Nick Kyrgios at the Coupe Rogers in Montreal in August.