Levi Colwill should not be deployed as a left-back, according to Glen Johnson (Picture: Getty)

Glen Johnson has raised a major concern over Chelsea star Levi Colwill this season and has fired a warning to Mauricio Pochettino about the defender.

Colwill has not missed a single minute of Premier League action for the Blues this term, having established himself in the XI after an impressive loan at Brighton.

Pochettino is a huge fan of the player and it is thought the Argentine boss refused to let him leave for Brighton permanently in the summer transfer window.

The 20-year-old can be deployed as a centre-back or left-back and has played in both roles under Pochettino.

But former Chelsea defender Johnson has urged Pochettino to stop using Colwill as a left-back because he could get ‘found out’ and ‘isolated’ in the position.

‘If you asked Levi Colwill he’d probably tell you he doesn’t want to be playing left-back,’ Johnson told Compare.bet.

‘He’s not the quickest and for me to be a full back you have to have some pace and so he looks like he’s playing out of position.

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‘It’s great that the manager trusts him enough to give him minutes but it would be best to play him where he plays best, which is at centre-back.

‘He’s technically good, good at passing it through the lines, and reads the game well but he just needs the right players around him.

‘He could get found out at left-back because he could get isolated out there.’

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‘He could get found out…’