Colin Braun pulled out a late flyer to take the top spot in the first practice session for the IMSA WeatherTech SportsCar Championship at Canadian Tire Motorsports Park. Braun posted a time of 1m07.341s in the No. 60 Meyer Shank Racing Acura ARX-06 to take over the top spot that had been held by Pipo Derani in the No 31 Action Express Racing Cadillac V-Series.R.

Braun’s time was 0.78s quicker than Derani’s best of 1m08.121s. The rest of the GTP field was in the 1m08s range as Acura and Cadillac alternated in the first four positions, Filipe Albuquerque third in the No. 10 Wayne Taylor Racing Acura ahead of Renger van der Zande in the No. 01 Chip Ganassi Racing Cadillac. Philipp Eng completed the top five in the No. 24 BMW M Team RLL M Hybrid V8.