MARTINSVILLE, Va. — When the reigning series champion slipped past him with one lap to go at Martinsville Speedway, Joey Logano figured he had lost his shot at racing for NASCAR’s title.

• Joey Logano clinched his spot in the NASCAR final at Homestead with a win in Martinsville
• Logano shoved Martin Truex Jr. out of the way on the final lap to take the checkered flag
• Truex Jr. promised to defend his title and beat Logano on the track

A win would earn Logano one of the four spots in the winner-take-all championship at Homestead-Miami Speedway. So if he didn’t try something, his chance at a Cup championship might slip away.

Logano used an old fashioned bump-and-run on Martin Truex Jr. to Sunday and snatch one of the four tickets to the finale. Truex slid sideways across the finish line and promptly declared Logano won’t take his title from him this year.

“He may have won the battle, but he ain’t winning the damn war. I’m not going to let him win it (the championship.) I’m going to win it,” Truex fumed.

Logano took Truex’s warning in stride.

“OK. That’s expected,” Logano said. “This was our shot, maybe our only shot, so we had to make it happen.”

Logano was showered in boos and Truex, standing on pit road next to his third-place car, jeered the winner with both thumbs down as Logano was interviewed over the address system. On pit road, Truex crew chief Cole Pearn Jr. had an angry exchange with Logano crew chief Todd Gordon. Nearly 30 minutes later, Pearn still appeared visibly angry.

Truex and Pearn are part of Furniture Row Racing, which is shutting down at the end of the season, a year removed from its championship run. Naysayers cast doubt on the No. 78 defending its title with the closure looming, but both driver and crew chief are determined to prove everyone wrong.

“With everything we’ve got riding on it, the team closing down, it’s tough to take,” Pearn said of his confrontation with Gordon. “I used a few choice words I probably shouldn’t have. I probably shouldn’t be around a baseball bat or a jackhammer right now.”

Logano won the opening race to the third round of the playoffs by using the bumper on his Ford to shove Truex out of his way on the final lap. The contact caused both cars to wiggle, but Truex’s slide was nearly sideways while Logano corrected after a swerve and straightened himself out as hurtled across the finish line.

“I’m a hard racer, I don’t think that’s a secret to anyone, and we are here to win a championship this year,” Logano said.

Eight drivers started the day vying for the four spots in the season-finale at Homestead-Miami Speedway. Now one of the slots is gone, to Logano of Team Penske, and NASCAR’s so-called “Big 3” is still trying to lock down a berth. Truex, along with Kevin Harvick and Kyle Busch, dominated the regular season and as a trio were expected to make it to Miami to race for the winner-take-all title.

Instead, Truex wound up third.

“We should be in victory lane right now,” said Truex. “I was next to him for six laps, I never knocked him out of the way. We were going to race hard for it, in my book. I cleared him fair and square. We weren’t even banging doors.

“And he just drove into the back of me and knocked me out of the way. Yeah, it’s short track racing. But what goes around comes around.”

Logano was aware how he won was not popular but his eyes are on the bigger prize.

“He raced really clean and I laid the bumper to him. I don’t expect him to be happy,” Logano said. “We’ve got to do what we’ve got to do, and he’s got to do what he’s got to do, and we’ll hash it out one way or the other. That’s NASCAR racing. That’s what the grassroots are, that’s what fans come here to see. Some may not like it.”

Logano led a race-high 309 of the 500 laps but had to contend with Penske teammate Brad Keselowski in the waning laps. That gave time for Truex, whose Toyota failed inspection prior to the race so he started 31st, to close in on the leaders.

Truex first got past Keselowski, who raced Logano so hard it is clear Penske does not have team orders, and got to Logano with 10 laps to go. They raced side-by-side, door-to-door, round-and-round the Virginia paperclip until Truex finally got the lead with one lap remaining.

Truex thought he was clear and headed to not only the right to defend his championship, but also his first career victory on a short track. Instead, Logano used his bumper to claw the victory back into his control and earned an enemy while doing so.

“I was next to him for six laps, I never knocked him out of the way,” Truex said. “We were going to race hard for it, in my book. I cleared him fair and square. We weren’t even banging doors.”