Sunderland Echo journalist James Copley believes Regis le Bris has done enough this season to "disqualify" himself from any major questions over their recent dip in form.
The Black Cats have won just one of their past six Premier League games, and also recently suffered a disappointing defeat to League One strugglers Port Vale in the FA Cup.
However, Sunderland still sit just two points behind bitter rivals Newcastle as they prepare to face each other on Sunday.
"To be on 40 points now is exceptional, and that disqualifies Regis le Bris from any major questions and criticisms heading into the next part of the season," Copley told BBC Radio Newcastle.
"It's an interesting game, derbies always are. There's a lot riding on this. If you get a win in the Premier League at the minute it can really catapult you off there.
"Le Bris finds himself in a difficult spot because he has redefined expectations, and because there's been a little drop-off fans have reacted to that, which I think is a shame.
"What Le Bris has done is exceptional, and what he's done this season is nothing short of phenomenal.
"But there are still a few issues especially at the top end of the pitch, which fans are right to address."
You can listen to the full derby day preview with Copley on BBC Sounds
