Now, a few days before the championship, it is known that Gjert Ingebrigtsen has applied for the right to the trademark "Ingebrigtsen method" shortly before the World Cup.
Plus he says he's already the only one who can use "Team Ingebrigtsen."
"I know that Gjert Ingebrigtsen recently contacted others in the team around his sons to point out that he has exclusive rights to the Team Ingebrigtsen name, and that there will be trouble if this is used commercially," says the Ingebrigtsen brothers' advisor, Espen Skoland, to TV 2.