The NASCAR Cup and Xfinity Series travel west to the Las Vegas Motor Speedway for a key playoff race weekend, headlined by Sunday's South Point 400. Both series will run the first race of the Round of 8, with the last month of the season upon them. Three Round of 8 races plus the championship race weekend in Phoenix is all that remains.

Here is what drivers had to say after Sunday’s Round of 8 opener at Las Vegas Motor Speedway: Joey Logano — Winner: “Oh my gosh. It’s an incredible turn of events coming from what was at the end of last weekend and what it was like Sunday night after a couple hours after the race and to this Sunday.