Antoine Sibierski told former Manchester City teammate Joey Barton to join Newcastle United.
Now with Wigan Athletic, Sibierski revealed to the Evening Chronicle: "Joey and me were big pals when we were both at Manchester City.
"I told him 'Joey, you must sign for Newcastle United'. And that this was too good an opportunity for him to miss.
"I was only there for a short time, but I found it to be a great club with great supporters.
"And I told Joey that he could win some things with them in the next few seasons.
"So this is a good deal for Joey but it is also a good deal for Newcastle as he is a fantastic player.
"I know that certain things have happened, but I think that when Joey does arrive at Newcastle they will find that he has matured a lot."