Lewis Hamilton was absent on Thursday as the rest of the formula one world congregated at the Shanghai circuit.
Mercedes said the 2008 world champion’s media, sponsor and team commitments had been called of because he was recuperating in the hotel from symptoms of allergy.
It is believed Hamilton’s reaction could be related to China’s notorious air pollution.
Reports said the Briton, apparently with eye and nose problems, was due to be seen by a doctor later on Thursday but is not expected to miss any track action.