The former New Zealand captain is aware that Toronto have a fierce competitiveness with Montreal Impact in MLS but revealed that it is nowhere near the hatred the Rovers and the Clarets have for each other.
"The most intense game I've ever experienced," Nelsen told the Canadian Press of the Lancashire derby.
"It's absolutely huge. It's way bigger than most people know in England."
Toronto defeated the Impact 2-0 in the first leg of the Canadian Championship semi-final on Wednesday night.