James McClean vented his frustration after being left as an unused substitute in Republic of Ireland's 2-1 win over Kazakhstan.
Giovanni Trapattoni, who has come under pressure this summer after the country's dismal showing at Euro 2012, saw his side produce arguably the worst performance of his four-and-a-half year tenure.
Kazakhstan, who are ranked 142nd in the world, completely outplayed the Republic in Astana and took the lead shortly before half-time through Kairat Nurdauletov.
The hosts then could have scored at least two more goals before they collapsed in a frenetic final two minutes which saw the visitors snatch victory thanks to goals from Robbie Keane and Kevin Doyle.
Trapattoni brought Doyle and Shane Long off the bench but did not call upon McClean, who has been outstanding for Sunderland this term - a move that has clearly enraged the 23-year-old.
Tweeting from his official account, @JMcC-23, the winger said: "Delighted as a fan we got the win.. Personal level #fuming #f****njoke #embarrassing." The tweet was later deleted.
Trapattoni is aware of McClean's rant and could fine the former Derry City man for his actions, or even kick the player out of the Republic's squad for their friendly against Oman at Craven Cottage on Tuesday - a game in which he probably would have started.