Jurgen Klopp felt referee Stuart Attwell failing to control Burnley’s physical approach contributed to an injury for Liverpool defender Joe Gomez.
The England international was taken off on a stretcher in the 23rd minute at Turf Moor after a heavy challenge from Burnley captain Ben Mee sent Gomez sliding into an advertising board.
Liverpool came from behind to win 3-1, setting a club record for most points 15 games into a league season, thanks to goals from James Milner, Roberto Firmino and Xherdan Shaqiri.
But Klopp was unhappy with the way Attwell refereed Wednesday’s intense clash at a rainy Turf Moor.
“The challenges from the beginning on the wet ground, the referee should have said something earlier,” Klopp told BBC Sport. “I told him if you don’t say ‘be careful’ they will keep going until something happens.
“The injury threat is hard, the first few challenges everyone likes and it is a part of football but it leads to the situation, no foul, what can I do, but Joe Gomez is injured.”