Convinced Craig Moore is certain Celtic have landed a signing gem after securing Harry Kewell's arrival.
The Socceroos icon joins as a key member of Ange Postecoglou 's coaching set-up as Australia's most revered ever player links up with his compatriot.
And the former Rangers star is convinced it bodes well for a host of attacking stars such as Kyogo, Daizen Maeda and Liel Abada ahead of a return to the Champions League for the first time in five years.
He also reckons Jota will reap the rewards of linking up with one of the finest wingers of his generation if the Benfica winger pens a long-term deal.
Moore worked alonsgide Postecoglou with the Australia national team and he convinced Kewell will also have a telling impact in Glasgow's east end.
Speaking to the Sunday Post, he said: “Harry knows football inside out, and he will relish this opportunity he has been given by Ange.
“We know that Ange doesn’t just appoint people for the sake of it. He worked with the guys he inherited at Celtic, and they gelled very well together last season.
“But it looks as though he has identified where things can be strengthened, and that has led to him bringing in Harry.
“I’ve known Harry for many, many years. It was a pleasure to play football with him.
“In my opinion, he is the best player Australia has ever produced. He was exceptional.
“Off the park, he is also a lovely fella, and great company.
“We have kept in touch, and I have used him on a number of occasions to tap into his football brain. He has great knowledge, and I respect his opinion.
“From the conversations we’ve had, I know how conscientious he is about coaching.
“He works ever so hard, and will be on that training field every day. He will also take players for one-to-one sessions.
“The players will respect his work, and love him as a person.
“I’m certain the likes of Liel Abada, Daizen Maeda and Kyogo Furuhashi will learn plenty from Harry, and he will improve their game.
“If they manage to get Jota signed permanently from Benfica, then the same will apply to him.
“Harry will add a few per cent to their games here and there.
“The Celtic players will really enjoy his work. He’ll do everything he can for them to make them better footballers.
“It also helps, in my opinion, when he has had the playing career he had. All the Celtic players will be aware of him.
“He was amazing with a ball at his feet, and his on-field game intelligence was exceptional. I used to love being on his side at international level.”