Ange Postecoglou reckons Reo Hatate needs "exposed" to the relentless pace of life at Celtic after a tired display against Rangers.
The midfielder made an instant impression at Parkhead following his January arrival from side Kawasaki Frontale with goals against against Hearts and Rangers.
However, those two goals at Celtic Park against Gio van Bronckhorst's men feel like a distant memory after a sluggish display in the final derby of the season.