Chelsea directors were upset with Eden Hazard starting from the bench for their 1-1 draw at Europa League opponents Eintracht Frankfurt.
The Times says the Blues were left 'baffled an unimpressed' by Hazard's omission from the starting XI.
The Blues are well aware the talented Belgian is expected to leave the club for Real Madrid this summer but still believe he should have started such an important game.
Chelsea have only three or four games left depending on the outcome of the Europa League semi-final and winning the competition would secure them a Champions League spot next term.
Manager Maurizio Sarri do not interfere with team selection and opted not to call Hazard in for talks to explain his decision.
However, with the 60-year-old's future still uncertain it further raises eyebrows over his suitability with Roman Abramovich and Marina Granovskaia due to discuss the Italian at the end of the season.