LONG POND, PA - JUNE 03: Jimmie Johnson, driver of the #48 Lowe's Chevrolet, talks with Brad Keselowski, driver of the #2 Miller Lite Ford, on the grid prior to qualifying for the NASCAR Sprint Cup Series Axalta "We Paint Winners" 400 at Pocono Raceway on June 3, 2016 in Long Pond, Pennsylvania. (Photo by Todd Warshaw/Getty Images)

One driver's team believes winning at Martinsville is the key to winning a championship

Brad Keselowski enters Sunday's race at Martinsville as one of the eight drivers remaining in the postseason, and he is also the defending winner at the track.

Keselowski will be going for the sweep at Martinsville after his win in April, and he hasn't swept a track in his eight-year Cup Series career. His crew chief, Paul Wolfe, said after Talladega that he believes Keselowski's needs to go into Martinsville and come out with a win so they can race for a championship.

"I think I've told my team that," Wolfe said to NBC Sports. "We've looked at it. You've got to be realistic about where you're at right now, where our cars are at speed?'wise, what our strengths and weaknesses are, and you've got to do your best to capitalize when you can.

"Absolutely, I look at Martinsville as we need to go there and win, and if we can do that, we'll race for a championship."

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Keselowski was the first Ford driver to win at Martinsville since 2002, and he might have the best chance of any non-Toyota driver to win the championship -- though Jimmie Johnson and Kevin Harvick both have championship pedigrees.

Martinsville has been kind to Keselowski in recent races as he has four top-5s in his last five races at the track.

Keselowski has three races to qualify for the championship race at Homestead. Only three drivers have won races this postseason: Martin Truex Jr. (3), Kyle Busch (2) and Keselowski (1). A win at this point in the season automatically qualifies you for the championship race.