Celtic’s head of football operations Nick Hammond watched the 20-year-old, who was a regular in the Championship last season, in their 3-1 win over Swindon Town on Saturday.
Doughty is going into the final 10 months of his contract and could move cross-border for a knockdown price come the summerCeltic would prefer to do a deal just now but they are waiting for a bit of clarity from the Charlton end.
Luton Town are also interested but the chance to move to Scotland would be a lot more appealing. Doughty is seen as one for the future while Neil Lennon’s first-team priority remains another left-back.
Celtic have already asked about loaning PSG’s young Dutchman Bakker for the season but they will need to up the ante financially.
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