FORMER Celtic striker Chris Sutton reckons the news that summer signing Giorgos Giakoumakis has a suspected calf injury is a "nightmare" for Hoops boss Ange Postecoglou.

Giakoumakis completed a deadline day move to Parkhead from VVV-Venlo in the Netherlands but is still to make his debut for the Glasgow club.

The 26-year-old was named on the bench for Thursday night's 3-0 Premier Sports Cup quarter-final win over John MyGlynn's Raith Rovers but didn't make an appearance as his side cantered to victory.

Posting on Twitter, Sutton wrote that Postecoglou confirmed that the Greek centre-forward missed out through injury.

"Nightmare for Ange Postecoglou," he wrote, "confirming Giakoumakis has a suspected calf injury…"