Portsmouth's administrator has told Sky Sports News that the club will return to the High Court on Tuesday as Her Majesty's Revenue and Customs is contesting their voluntary administration.
The Inland Revenue is said to be furious that the Premier League's rock-bottom side managed to avoid Monday's winding-up order for a £7million unpaid tax bill by entering administration on Friday.
Administrator Andrew Andronikou has confirmed to Sky Sports News that he and Portsmouth's lawyers are due back in court at 10.30am on Tuesday as a result.
This is a hard-line stance from the Inland Revenue due to a reported anger over the fact that it is not considered a priority creditor.
Andronikou remains calm and is not overly concerned by the latest development, saying: "We're having to go to court to show that the debenture is valid.
"I don't understand the exact reason why this is, we're just following normal protocol. We're not unduly worried.
"It's not standard procedure but I'd imagine that HMRC are basically crossing their Is and dotting their Ts.
"We're expecting the administration to proceed as it was."
Victor Cattermole had confirmed earlier on Monday that he is still interested in buying Portsmouth.
The New Zealand businessman believes his Endeavor Plan consortium is well-placed and he feels the problems at Fratton Park are not as bad as has been suggested.
Andronikou is hopeful that a deal will be reached after announcing that he is still in contact with a number of potential buyers.
He told Sky Sports News: "We have got a number of interested parties. As I have said before, I need them to prove funds and then we will take it to the next stage."