Chris Sutton has suggested in The Daily Record that Saidy Janko is a concern for Celtic.
Janko joined Celtic in the summer of 2015 after leaving Premier League giants Manchester United.
The 20-year-old is a talented young footballer who can play as a right-back or as a right-winger.
Former Celtic striker Sutton, though, has suggested that the Switzerland Under-21 international is a bit too attack-minded.
“Saidy Janko was brought in at right back for the Malmo game and has had injury problems, but is not defensive-minded like many modern full backs these days and that’s a concern,” Sutton wrote in The Daily Record.
Celtic are at the top of the Scottish Premiership table at the moment with 58 points from 55 matches.
Ronny Deila’s side are three points clear of Aberdeen, who are currently second in the standings and have played a game more.
The Glasgow giants will return to action on Saturday afternoon when they take on Inverness Caledonian Thistle at Celtic Park in the Scottish Premiership.
Inverness are sixth in the league table at the moment with 32 points from 24 matches. Celtic will head into the match on the back of a 2-0 victory over Ross County at home in the league.