Joey Logano was fastest in the first of two Saturday practice sessions for the Cup Series at Dover International Speedway.
With a speed of 157.494 mph Logano led a Team Penske sweep of the top two spots on the speed chart.
Brad Keselowski was second with a speed of 157.453 mph. He also had the best 10-lap average at 156.399 mph.
Logano, who won last week at Talladega, will start Sunday’s race 18th. Keselowski starts eighth.
The top five in the session was completed Martin Truex Jr. (157.048 mph), Chase Elliott (156.883) and Aric Almirola (156.856).
Pole-sitter Kyle Larson was seventh fastest (156.835).
Kurt Busch recorded the most laps with 50.