"Everyone has been talking about the large momentum shifts, whether they're generated through officialdom or the side's own errors," said Hasler.
"But the nature of the finals series has been so far that the referees have stayed right out of it and I think the referees have done a really good job so far in the finals."
The Bulldogs have won back-to-back games in the finals, but still it's unusual for a coach to be handing out free compliments to referees.
Less surprisingly, Hasler also applauded the decision of the match review committee not to charge Bulldogs forward Josh Jackson for a chicken wing tackle last weekend.
Critics have slammed the decision as inconsistent and promoting a poor image for the game, given the NRL have otherwise punished the illegal wrestling manoeuvre this season.
But Hasler said the panel got it right, with the Bulldogs' most influential back-rower free to tackle the Panthers on Saturday.
Jackson admitted it was a nervous two days as he waited for the NRL to hand down its verdict, conscious that the tackle didn't look good on television replay.