ANGE POSTECOGLOU has insisted Celtic will "stay alert" in the closing stages of the transfer window.

The Parkhead manager hasn't ruled out further additions in the summer window but admitted it might depend on outgoings.

Postecoglou offered an update on transfer plans after the thumping 9-0 win over Dundee United as the summer window nears a close.

And while the Celtic boss is pleased with his squad and the transfer dealings  so far this summer, he admitted more business could be done if the right opportunity arises.

Speaking on BBC Radio Scotland, Postecoglou said: "We will stay alert if the right opportunity comes along.

"It'll depend maybe on a couple of outgoings as well.

"Then we'll move, if not what we have done so far has been a good window for us."

And on his current squad the Celtic boss was asked if he is pleased with the side currently.

He added: "Yeah, at the moment. But there are still challenges ahead.

"The game of football doesn't allow you to rest and reflect for too long, the challenges will come thick and fast."