Just one month after being dropped by McLaren, a move which followed the shock news that he was heading to NASCAR in 2007, Juan Pablo Montoya has admitted that one of the reasons he walked away from F1 was because he was bored. Talking to Colombian journalist Yamid Amat of El Tiempo, Montoya also reveals that his relationship with team boss Ron Dennis had sunk to an all-time low.

"I decided to leave before starting to curse it," admits the Colombian. "I left because of boredom, I wasn't enjoying the races. I had already done all that I had to do and had almost completed all the goals that I set.

"I only lacked a championship and I realized that the possibility to achieve it was minimum," he continues. "To leave was the best decision that I could have taken."

Asked if the championship was possible, he replies: "Not impossible. I had a chance, but much of it depends on the team that one is with."

"To fight for fifth position is not amusing," he adds. "I wanted a new challenge. That's NASCAR. It's different, fresh. I can run for 10-15 more years. It is another world, it is more relaxed, people are more kind. It is another history..."

Referring to the "boredom" and the comment regarding challenging for fifth, the Colombian said: "The car drove me to boredom. My teammate was also finishing fifth and sixth. We were always finishing in the same place. It wasn't me, it was the car. I had many problems with the car, there were many changes made, there were many flaws..."

Asked about the relationship with Dennis, Montoya says: "I didn't even speak to him. When I left, his lawyer called mine and told him: 'This is what we will do'. It was settled this way: lawyer to lawyer.

I was very bored. One day I called Ron and told him: 'Listen Ron, I want you to know that today we will announce that I'm leaving. I will run in NASCAR with Chip Ganassi and I want you to know it before it becomes public...'"

According to Montoya, the McLaren team boss simply replied "Right". "The conversation didn't last 20 seconds," he adds. "There was nothing else to talk about."