Cardiff City owner Vincent Tan is considering legal action against sacked manager Malky Mackay.
It all comes because of the signing of striker Andreas Cornelius in a club record £7.6 million deal from Copenhagen.
Tan is furious that their bid to land the 20-year-old could cost the club over £20 million with adds on including a £1.5 million signing on fee and a five-year contract worth £11.7 million.
Cornelius has yet to score in seven outings for Cardiff in the Premier League.
The striker has yet to start a match for the Welsh side, leading to him being labelled as a flop by many fans and the media.
The Mirror claims Tan remains unhappy with Mackay, who has yet to receive his compensation package from the controversial Malaysian owner.
Since then, Cardiff have installed Ole Gunnar Solskjaer as manager.
"Mackay was instructed to go out and buy a Bentley," a source close to Tan apparently told the Mirror.
"He got the funds to get some top quality international players, but Mr Tan feels Mackay bought a Toyota instead."
Tan is also said to be unhappy with the £10 million fee paid to Sevilla for Gary Medel, a figure that could rise to £15 million based on appearances.