#9-Chase Elliott was fastest during opening practice at Dover International Speedway with a speed of 157.618mph. #33-Cale Conley was second, followed by: #3-Ty Dillon, #60-Chris Buescher, #22-Joey Logano, #42-Kyle Larson, #2-Brian Scott, #11-Elliott Sadler, #7-Regan Smith, and #6-Trevor Bayne. 33 drivers practiced during the session. See complete results on the Dover practice 1 speeds page (pdf).
