ITV Football tweeted "Bye bye Celtic" after the club was drawn to play Barcelona, the four-times Champions League winners and current favourites, Benfica and Spartak Moscow in the group stages.
Celtic manager Neil Lennon, left, raised concern and fans tweeted their disgust at the message. The Parkhead boss said: "I think ITV owes us an apology." One fan said: "I assume @itvfootball also think Man City have a very tough draw. But no "bye bye Man City" tweets. Interesting."
Manchester City were drawn in the so-called 'group of death' with Spanish champions Real Madrid, Dutch league winners Ajax and German Bundesliga victors Borussia Dortmund.
ITV Football later deleted the offending message and tweeted: "To Celtic fans out there – we mean no disrespect. An ill-advised way of us saying we think you've got a very tough draw. Apologies."