AIK defender and close friend Mikael Lustig is happy for Alexander Isak over his move to Newcastle United.
The Sweden striker joined Newcastle from Real Sociedad for £60m.
Lustig told Sportbladet: "He got exactly the start you want. It is clear that there will always be talk of the price tag and there will be pressure on his shoulders. But those of us who know him know what a down-to-earth guy he is, he will handle it well. It will be fun to follow.
"Yes absolutely, I am very proud. Those of us who have seen him and trained with him know that he has it in him.
"He maybe stalled a bit in Sociedad last year, I think this move will do him good."