#7-Regan Smith was fastest during opening practice at Chicagoland Speedway with a speed of 175.953mph. #60-Travis Pastrana was second, followed by:#99-Alex Bowman, #31-Justin Allgaier, #3-Austin Dillon, #77-Parker Kligerman, #6-Trevor Bayne, #2-Brian Scott, #20-Brian Vickers, and #22-Joey Logano. All 41 drivers practiced during the session. See complete results on the Chicago practice 1 speeds page (pdf) .
