Sunderland manager Martin O'Neill has warned James McClean over his behaviour following the Twitter rant that landed the winger in hot water with his international manager.
• Trapattoni warns McClean
McClean, 23, received a dressing down from Giovanni Trapattoni after expressing his frustration via the social networking site at not making it off the bench in Republic of Ireland's 2-1 win over Kazakhstan on Friday.
The former Derry City man was quick to delete the tweet before having to apologise to Trapattoni and the rest of the Ireland squad for the incident.
Now his club boss O'Neill has made it known how he feels about his player's behaviour.
"James has been acting rather strangely," he said. "It's good when the player not only wants to play but he also wants to manage the team as well. James is rather young for that at the moment. I think Mr Trapattoni has got a couple of years on him and a couple of titles too in front of James, so I think he's entitled to pick the team.
"He has even admitted himself he has been rather foolish. He has taken himself off Twitter, apparently, then he might have a situation with Facebook as well and about 14 other accounts that he has. He has a bit of a problem and we will have to rectify it. We can have a bit of a joke about it and laugh about it and think: 'Well, that's okay'."
The Sunderland manager made clear McClean's behaviour did not fall in line with the club's policy while also expressing his dislike of the player's language - McClean labelled Trapattoni's decision a "f****n* joke".
"He does know the rules - they were read to him, they were given to him, he was there that day - and, not only that, some of his language was pretty poor and we will have to deal with that. Genuinely, we can have a laugh about it first of all, but now it's getting a bit ridiculous."