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.
Pole-sitter Kyle Larson was seventh fastest (156.835).
Kurt Busch recorded the most laps with 50.