Huddersfield Town boss Neil Warnock hinted that he wants Reading relegated from the Championship this season.
The veteran, who had famous run-ins with the Royals in the past during his time with Sheffield United and Cardiff City, is looking to guide the Terriers away from danger.
Ending a five-match unbeaten run yesterday with a 1-0 defeat to Swansea City, they sit one point ahead of Noel Hunt's side.
Speaking after the defeat in South Wales, the 74-year-old said: "I didn't think Cardiff played bad earlier, Reading got a point against Burnley. We obviously just played them at the wrong time didn't we?
"Everyone is playing for something and that's the kind of challenge I thrive on.
"I was disappointed I didn't hear anything from their fans. I asked, have I done something wrong, they're not having a go at me?!
"I had one of the best times of my life at Cardiff with a great chairman. To get automatic promotion was something special. I heard one or two cheers in the Swansea dressing room before the game...but don't forget, in football what goes around comes around. It'll only be a matter of time before Cardiff get a good team together and batter them.
"I hope Cardiff, ourselves and Rotherham survive, so you know who I want to go down."
The most successful manager at second tier level, the Yorkshireman has managed Cardiff City, Queens Park Rangers, and Rotherham United in the last decade- all around Reading in the fight for survival.
Supporters noticed this on social media, adding to the mutual dislike between Reading fans and Warnock.
One said, "He has never liked us as a club. Not usual for a manager of another club to say who they want to stay up or get relegated. We obviously bother him for some reason."
Another added: "Bound to be- he won't want qpr to go down . He will love the final day if he sends us down."
Hunt takes the Royals to Huddersfield on the final day of the season, potentially a straight shoot-out for survival.
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