Fans with tickets to either race will be admitted for both. Tickets are available here.
Chase for the NASCAR Sprint Cup drivers Kyle Busch, Joey Logano and Austin Dillon all were entered in both races and faced the prospect of 600 high-speed laps at the Monster Mile in a single day Sunday with the schedule change.
Saturday's on-track action started well for the second Sprint Cup practice at Dover. But sprinkles turned to heavier rain with 15 minutes left in that practice, bringing out the red flag after 45 minutes of the 55-minute session.
Final Sprint Cup practice was set for 1:30 p.m. ET, but ultimately was canceled due to inclement weather.
Friday's Sprint Cup Coors Light qualifying also was canceled due to persistent rain. The field was set by owner standings, allowing Brad Keselowski to start P1 for the second time this year. The Sprint Cup Series will return to the track tomorrow for the Citizen Soldier 400 at 2 p.m. ET (NBCSN/NBC Sports App).
*Contributing: Reid Spencer from the NASCAR Wire Service