From the fact that it's the lone track to have been on the sport's schedule every year since the sport's beginning to the Grandfather clock handed out to the winner, no racetrack better represents time in NASCAR than Martinsville Speedway.

The NASCAR Cup Series will set the Championship 4 during Sunday's Xfinity 500 race at Martinsville Speedway. Tyler Reddick locked himself into the Championship 4 with the last-lap pass and win at Homestead last week,

The Championship 4 will be set this weekend at Martinsville Speedway as drivers battle at the historic Virginia short track. Here's a full preview of the Xfinity 500.