ANGE Postecoglou has opened up on his decision to appoint fellow Aussie Harry Kewell to the Celtic coaching staff and admits it's all about keeping his players on their toes.

The team may have lifted the championship last season at the first time of asking under the former Yokohama manager but he's is not one to rest on his laurels.

Postecoglou wants to implement a coaching set-up that is always evolving to be better and he reckons the Champions League winner can rub some of the attacking stardust from his playing days onto the Hoops' forward line.

He said: "Harry Kewell is someone whom I know through the Australia connection but we have never worked together. He is one of Australia's greatest ever footballers and a guy who has worked really hard to get a coaching career going. From afar, the reports that I have had on him is that he will bring some really good qualities in terms of his on-field coaching and his ability to mentor players.

"It was really important that when the players came back this season they understood that nothing stands still and there is a constant evolution. We want to better every year and seeing a couple of new faces in the staff is going to help that. He will bring energy as I know he's super excited about being involved at this level and this football club.

"He's got Champions League experience as a player and has won it. He was an attacking player and that will help the group and the balance we have in the coaching group. Alongside Stephen McManus and Darren O'Dea, I have a really good, exciting vibrant young coaching group who will put a lot of energy into the first team and the B team this year."