RELATED: Full practice results
Kurt Busch topped the speed charts during Friday's first Sprint Cup practice at Phoenix International Raceway with a fast lap of 138.846 mph in his No. 41 Stewart-Haas Racing Chevrolet.
Right behind him was 2015 Daytona 500 winner Denny Hamlin in the No. 11 Joe Gibbs Racing Toyota at 138.467 mph as the top five changed multiple times in the final 10 minutes of the 85-minute session.
Rounding out the top five were Joey Logano in the No. 22 Team Penske Ford, Martin Truex Jr. in the No. 78 Furniture Row Racing Toyota and Kevin Harvick in the No 4 SHR Chevrolet.
Sprint Cup Series points leader Kyle Busch was eighth on the leaderboard with a speed of 137.715 mph in the No. 18 JGR Toyota.