Cardiff City boss Neil Warnock was left furious with the referee after he didn't award a penalty to the league leaders during their 1-0 defeat to Birmingham City.
In the past Cardiff have not found St. Andrew's a happy hunting ground and this game was not an exception as they slipped to only their second defeat of the season.
In the 14th minute, the Bluebirds were powerless to keep out a persistent Che Adams.
He gained possession way out on the left from goalkeeper
Neil Etheridge's clearance and showing great determination went on a solo run fully focused on making his way towards the Cardiff goal.
The Cardiff defence retreated as Adams created space for himself to fire home a low, raking shot to the left of Etheridge.
It was a terrific boost for Birmingham under their new management team and the goal was certainly a big lift in their present circumstances.
Cardiff resolutely attempted to play themselves back into contention with Joe Ralls setting up several good moves.
But Birmingham had their tails up and resolutely fought for everything.
The Welsh club's best chance of an equaliser came when Junior Hoilett cut in from the right only to fire wide.
Birmingham took their newly-acquired attacking policy into the second half but were forced to hang on as Cardiff battered the home side in their unsuccessful bid to grab an equaliser.