Gabriel Obertan left St James' Park ahead of Newcastle United's game against Arsenal after learning that he would not be involved in the match, according to a report.
The Daily Mail claims that the winger "flounced off in a huff" when manager Alan Pardew revealed his team for today's game, which ended in a 1-0 defeat for the Magpies.
The 24-year-old was seen heading for the players' car park an hour before kickoff and is not thought to have returned.
Obertan has not started a game in the Premier League this season.