Campbell led the way around the classic 2.238-mile track on the beautiful Monterey peninsula in the one hour, 45-minute practice session, but was chased hard by GTP class rivals Cadillac and Acura.
Campbell lapped the #7 Porsche Penske Motorsport 963 in 1m15.903s and then 1m15.493s – making it an early Porsche 1-2 with Nick Tandy’s initial 1m17.142s effort.
