So it was of little surprise that they didn't have the same view of their incident with four laps left in the Xfinity Series Food City 300 Friday night at Bristol Motor Speedway.
Busch attempted to pass Keselowski for the lead by using the inside lane, and when Busch tried to come up in front of him in the upper lane, Keselowski clipped him in the right rear. Busch's car slapped the fence and then got plowed into from behind by Ty Dillon.
As he left his hauler, Busch was asked if he thought that incident was clean, and he replied: "He's a dirty racer."
Keselowski said while he didn't want to see it end that way, there just wasn't enough room and he had position in the lane. He said Busch had no choice to slide up because the inside lane wasn't as good in Turns 3 and 4 as it was in Turns 1 and 2, where Busch initially had made the move to pass.
"We race each other hard," Keselowski said. "That's what racing is all about. He would have done the same thing if he was in my shoes, I'm 100 percent certain. I guess we're both dirty racers, then, by that definition."
The two drivers have traded barbs before, including at Bristol in 2010 when they had contact on the track. There would be little surprise if they battled for spots again in the Sprint Cup race Saturday night.
"Everybody loves hard racing until they are a part of it and it is their driver that doesn't come out on the good end," Keselowski said.
Keselowski ended up losing the lead when he ran out of gas with four laps left in the race, which was extended by eight laps for cleanup after the Busch wreck. Austin Dillon won the race. Keselowski ended up 12th, and Busch was 24th.