Hendricks - formerly of CAN Associates - tweeted last night about how he recently apologised to Price over "damaging" press coverage.
He wrote: "Very soon I am going to explain exactly what I apologised to Katie Price about and certain people will hang their heads in shame."
He followed this up today by tweeting: "The reason why I apologised to Katie Price was that certain people you I had worked with were feeding untrue and damaging stories to the press without my or Nicola Partridge knowledge (sic).
"I am going to back up this statement with documentation so that no one can challenge it. I will give you more tomorrow."
Her current management team Black Sheep has since backed up Hendricks's claims about "false" stories.
It tweeted: "Kate has been aware for some time that people that used to be close to her have provided false and/or confidential information to the press.
"This information has been designed to deliberately damage her and has caused immense damage and distress. Kate has had to think about the issues that will be raised by dealing with these matters and is taking advice from her lawyers and family."
They added: "Thank you to all those that have disbelieved many of the stories that have been circulated by those with their own agenda."
Price was represented by CAN Associates while she was married to Peter Andre.
The model paid Hendricks's former partner Claire Powell damages over claims that she had an affair with Andre in 2010.
Black Sheep Management recently dismissed rumours that Price had reunited with her former husband.
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