Harry Kewell to Celtic earns glowing Australian verdict as Mat Ryan applauds Ange Postecoglou link-up

Celtic are doing some smart business by appointing Harry Kewell, according to Australia keeper Mat Ryan.

Australian football legend Kewell is set to join Ange Postecoglou 's backroom team in time for pre-season kicking off later this month.

Ryan was installed as Australia's first-choice keeper by Postecoglou and he's delighted to see his former coach linking up with the ex- Liverpool star.

The Real Sociedad 'keeper, formerly of Brighton and Arsenal, reckons Postecoglou and Celtic will benefit from having Kewell on board, after his stints as manager at Crawley Town, Notts County, Oldham Athletic and Barnet.

He said: "Another well-respected, and deservedly so, name in football linking up there with Ange from what I can see is only going to be a positive.

"I wish them all the best if that is the case and they're working together.

"Hopefully, they can just keep growing a strong Australian name and respect in European football or in world football.

"The more respect they get, hopefully, it's more and more opportunities for the Australian stars of tomorrow to get opportunities over in Europe, in the bigger and better leagues."