The Daily Telegraph quoted witnesses who said they saw Nicole Kidman's husband lose control and fall off of his bike near his home, while a photographer on another motorcycle was following him.
"Today's incident was the result of one person's desire to do his job and my desire to maintain my privacy," Urban said in a statement issued to TMZ.
"Some have already attempted to inflate the facts, but the reality is this; while out riding to an AA meeting, a time when my privacy is especially important to me, I felt myself being pursued," he explained. "I sped up, and in an effort to elude an oncoming car, which was making an illegal U-turn, saw no choice but to drop my bike. In actual fact, my pursuer came to my assistance, without taking photos, and helped me from the road. I returned home, got my car, and continued on my way."