Chelsea players were unimpressed by owner Todd Boehly's decision to introduce Mykhaylo Mudryko before their clash with Crystal Palace in January.
The Daily Mail says Boehly wanted to present Mudryk, a 100m signing from Shakhtar Donetsk, to the players and former manager Graham Potter's staff.
However, senior players were unhappy with members of Mudryk's entourage also being invited into the locker room before kickoff against Palace.
Mudryk was presented on the pitch later at halftime.
But the decision to allow Mudryk's support also into the dressing room left many of his new teammates unhappy.