This season may only be a couple of months old but we've already witnessed sideline tantrums, frosty glares, and threats of quitting from players who have not hesitated to express their disgust at a lack of playing time.
Inter Milan's Alexis Sanchez became the latest to make his frustration known as he took to social media to take aim at manager Simone Inzaghi for playing him for a total of just 70 minutes this term.
With tensions rising for a number of players who have barely played any minutes since the start of the season, several could be on the move this January.