Queenslander Campbell, who races for Porsche Penske Motorsport in IMSA competition in America, led the hour-long session with a fastest lap time of 2m02.7513s around the fabled Mount Panorama circuit.
The session was red flagged almost immediately for the #101 Mercedes stopping on track, although Nicky Catsburg bizarrely continued for another lap in his Craft-Bamboo Mercedes – incurring a 10-minute hold penalty for ignoring the reds when the track went green again.
