Celtic defender Shane Duffy

Shane Duffy is not expected to play again for either Celtic or Brighton as he prepares to join a new club this summer, Football Insider understands.

This site revealed on Wednesday that Derby County are lining up a loan move for the centre-back, 29, if they retain their Championship status this weekend.

Celtic’s wretched season has two more fixtures to be completed, league clashes against St Johnstone and Hibernian.

A Hoops source has told Football Insider that Duffy won’t be used by interim manager John Kennedy in either of them barring an injury crisis.

He has not started any of the club’s last 10 matches and has been virtually frozen out since January.

Tellingly, Duffy has failed to even make the 20-man matchday squad for the most recent games against Rangers and Aberdeen.

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His season at Celtic is ending on a whimper after starting in such grand fashion when he was recruited from Brighton last September.

The Republic of Ireland international scored in each of his opening two matches and initially settled in well at defence.

But a series of errors saw him lose the confidence of former manager Neil Lennon and questions were asked of the value of what by Celtic standards is an expensive loan.

The Hoops agreed a deal in which they paid a seven-figure loan fee for Duffy as well as a significant portion of his £45,000-a-week Brighton salary.

Seagulls boss Graham Potter will given the green light for the defender to leave once again in the upcoming window.

Duffy has a contract with the Premier League club that runs until 2023 and is more likely to go on loan again than move on a permanent deal.

In other news, Gabriel Agbonlahor has predicted Celtic will land multiple new signings after “killer” development.