His poor grass court season continued with a first round retirement against Marcos Baghdatis at Wimbledon .
In the 2018 Gerry Weber Open , Thiem was upset in the second round by Yuichi Sugita .
Thiem 's poor grass court season continued with a first round retirement against Marcos Baghdatis at Wimbledon .
In the 2018 Gerry Weber Open , Thiem was upset in the second round by Yuichi Sugita .