Andreas Christensen's Chelsea career has stalled under Maurizio Sarri.
The Danish defender became a regular in the 2017/18 season under Antonio Conte; featuring 40 times in all competitions.
But he has been handed just 12 appearances this season as he has found first team opportunities hard to come by under Sarri.
Only one of those appearances have come in the Premier League, where Christensen played all 90 minutes in Chelsea's 2-1 defeat to Wolves in December.
He clearly isn't a player Sarri has a very high opinion of.
And, his actions during Chelsea's defeat to Arsenal on Saturday has made him go even further down in Sarri's estimation.
The Times report that Christensen 'angered' Sarri after he left the bench with over 15 minutes left to play at the Emirates Stadium.
They write that the Danish defender went to the dressing room when Sarri used his final substitution.
It is believed he told his fellow unused substitutes that he was going to the toilet, but he did not return to the bench.
His behaviour has been 'noted' by Sarri, who is unimpressed by his lack of professionalism.
To be fair, that is out of order from Christensen.
To not return to the bench after going to the dressing room is just very poor behaviour.
Christensen has said in the past few months he is 'frustrated' about not getting more first team opportunities, but these actions are unprofessional and unacceptable.
Sarri has every right to be angry with the defender.
Despite only picking Christensen for one Premier League game this season, Sarri commented that the defender was now 'ready to play' earlier this month.
Speaking to Chelseafc.com, the Italian boss said: "He has improved in defending by looking at the ball. Now he is ready to play. We have a very good option for David, for Rudiger."
However, after his behaviour against Arsenal, Sarri might think twice about picking the 22-year-old in the future.
Do you think Sarri has every right to be angry with Christensen? Have your say by leaving a comment below.