Chelsea fans have claimed that Ian Maatsen's career could be close to the end of his time at the club.
The left-back is unhappy at the lack of game time he is receiving under coach Mauricio Pochettino.
Maatsen, who has not even signed a new deal with the club despite months of negotiations, is in hot water.
When United midfielder Sofyan Amrabat posted on social media after his side's win over Chelsea, few expected Maatsen to respond.
However, he did appear to add a 'fire emoji' and a 'saluting emoji' in response to Amrabat stating: Great spirit and great performance! Thanks for the amazing support."
Many fans on social media have said that such a mistake may cause Maatsen to lose his Stamford Bridge career.