The full-back has been missing for the start of the season.
Celtic have been handed an injury boost ahead of this weekend's League Cup clash against Kilmarnock.
Speaking during pre-season, Rodgers explained: "Alistair had an issue when he came back from international duty."He’s had an operation, he’s had a couple of little bits removed from there successfully."But hopefully it will be a bit sooner than that.Johnston could now return to action this weekend as Celtic meet Kilmarnock in the Viaplay Cup round of 16, although it is unlikely that he will risked on the artificial Rugby Park surface.
The 23-year-old defender’s previous contract was due to expire at the end of this season and it looked like his time with his boyhood club might be nearing an end when he fell out of favour under previous boss Ange Postecoglou.
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