Chelsea owner Todd Boehly is said to have confronted a senior player in the dressing room.
The American, whose spell in charge of the club has coincided with a sharp decline in their league position, is under heavy criticism from the fans.
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Boehly has overseen a spending spree of more than $1 billion, which has not yielded any results.
Per The Telegraph, Boehly reportedly singled out winger Raheem Sterling after a 2-1 loss at home to Brighton last April.
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The American reminded Sterling that he is a world-class player, mentioning his Premier League wins.
However, he added that Sterling was not performing up to standard and that he must improve.