Celtic have expressed an interest in Sweden defender Carl Starfelt, according to reports.

The centre-half, who plays for Rubin Kazan in Russia, is seen as a long-term replacement for wantaway defender Kris Ajer who could still leave the club this summer as Norwich continue to monitor him.

The Canaries are expected to return with a bid of around £12million for the defender.

That would leave Ange Postecoglou short of stoppers with Christopher Jullien not yet fit and Stephen Welsh still relatively inexperienced.

Starfelt, meanwhile, played 30 times in Russia last season at club level and managed two caps for Sweden against Denmark and Estonia respectively.

The 26-year-old counts ex-Celt Mikael Lustig and current Rangers ace Filip Helander as international teammates.