The Republic of Ireland international initially joined Celtic on a six-month loan deal in January from Norwich City and he became a very popular player during that period.
Idah scored the winner against Rangers in the Scottish Cup final, including many other important goals and there was a clamour to bring him in.
Hyeongyu Oh was Celtic’s back-up striker, at the time, but he didn’t bring that spark to proceedings and would then secure a transfer to Genk.
Therefore, it was even more understandable that the Bhoys would bring Idah in to, not just add quality to the bench, but also challenge the main man, Kyogo Furuhashi.
But fast forward to the present and doubts are beginning to creep in, even though it’s still early in the season and there are many more important games coming up.
John Hartson questions Adam Idah’s Celtic transfer
A Celtic fan rang up Go Radio and expressed that they don’t like Idah as a player or why the club brought him in this summer.
John Hartson was on hand to listen to the call and he didn’t disagree with that viewpoint and was pretty brutal in his own verdict.