Joey Logano was fastest in the first Cup Series practice session Friday at Dover International Speedway.
Logano posted a top speed of 163.221 mph around the 1-mile track.
The top five was completed by William Byron (162.133 mph), Jimmie Johnson (161.834), Ryan Blaney (161.507) and Alex Bowman (161.067).
Bowman recorded the most laps in the session with 50.
Kevin Harvick had the best 10-lap average at 158.066 mph. Johnson was second at 157.304 mph.
Click here for the practice report.
Final practice is scheduled for 3:33 to 4:25 p.m. ET on NBCSN