Lee Bowyer admits he's "over the moon" watching Joe Aribo's Rangers rise - but joked the midfielder will be raging at the Scottish weather.
The Charlton boss was highly critical of his former player's move to Ibrox last summer - insisting the transfer would see his career hit a dead end.
But Aribo has shone under Steven Gerrard at home and abroad and Bowyer concedes the move has worked out for him.
The 22-year-old has Europa League knockout football on his horizon and his Rangers displays also earned international recognition with Nigeria.
Bowyer insists he's backing Gerrard's team for success this season but quipped the wintry conditions engulfing will have left Aribo gutted.
He told talkSPORT: "I'm over the moon for Joe but I bet he's not enjoying the weather up there just now!
"All I've ever wanted is for him to be successful, I love the kid and he improved under us.
"Obviously I would've loved for him to stay with us but he's doing well for Rangers. I've got to be happy for him and Rangers.
"Hopefully they go on and do well."
He'd previously hinted at a belief the player had been "pushed" into the transfer and cast doubt on him one day landing a switch to the Premier League.
“I worked so hard to get him to this situation he is in now,” said the Addicks boss. “It is about progression for him.
“So it’s a shame if he gets pushed to somewhere where it is not going to benefit him in his football career. If he goes to Rangers that is not the right place for him to go for his football career.
“You have got Rangers and Celtic who are massive clubs, I get that. And I get that Steven Gerrard was a great player, so that’s an attraction. Those two things are the attraction – but not everything else.
“It doesn’t make sense on the football side. When people from England go and play for Celtic and Rangers it is at the end of their careers. That’s because it is very rare you get a move from Rangers to the Premier League, and I don’t mean any disrespect by that.
“They might go from Rangers to the Championship, very rarely is it to the Premier League. For me he should stay in England and keep progressing. The move should benefit Joe.”