Jackie McNamara has admitted he is uncertain over the talents of Christopher Jullien after the defender’s first home game for the Hoops.

Speaking exclusively to Football Insider, the former Bhoys and Scotland star says that it was a shaky performance for the 26-year-old against Dunfermline Athletic in the Scottish League Cup, lining up alongside Kristoffer Ajer at the heart of the defence.

Despite having played three times for Celtic prior to the cup clash, the 2-1 win was the first time he had played in front of the Parkhead faithful.

McNamara, who was at the game, says that he was not convinced by the former Toulouse man’s display, insisting he could have cost the Hoops the game.

McNamara told Football Insider: “His first game at Celtic Park, there were a few shaky moments and they had to change their system a little bit, putting Bolingoli to left wing-back.

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“He’s one I need to see a few more times to pass judgement on him. He had a few mistakes in the game that could have cost them – that short pass back that could have been costly and the high kick in the box.

Jullien has played twice in the Champions League qualifiers this season as well as playing the full 90 minutes in the Premiership victory over Motherwell, with his only clean sheet coming away at Nomme Kalju.

The Hoops’ next game sees them take on Swedish outfit AIK at home in the first leg of their Europa League qualifier, the victor over two legs heading to the group stages.

In other Celtic news, Football Insider can reveal that the club have opened talks to sell one of their international players before the end of the window.