The 62-year-old was back in the dock at Westminster Magistrates' Court in London as his defence team sought to argue against the admissibility of much of the evidence presented by the Indian government.
Thursday's hearing was expected to be one of the final hearings in the case but it remained inconclusive as the defence is yet to complete its arguments, which seek to demolish the Indian government's case.
The Crown Prosecution Service (CPS), arguing on behalf of the Indian government, is then set to respond and argue in favour of the evidence and against the defence's claim of "absence of a strong prima facie case on grounds of iniquity".
Due to prior diary commitments, no date has been set for the next hearing on the matter and Mr Mallya has been bailed until April 2. Both sides will determine a date to return to court to complete their representations on the admissibility of evidence in the case within the next three weeks.
During Thursday's hearing, Mr Mallya's barrister, Clare Montgomery, argued that evidence that was claimed as a "blueprint of dishonesty" by the CPS was in fact a privileged conversation between Mr Mallya and his lawyer about "legal advice in clear contemplation of litigation" and hence should be inadmissible.
On a separate category of evidence presented by the Indian government, Montgomery questioned the reliability of investigating officers in the case.
She pointed to over 150 pages of "near identical material" purporting to be statement of witnesses taken under Section 161 of the Indian CrPC.
Dismissing the nature and source of these witness statements, Mr Mallya's legal team claimed they do not meet "obligations" under the India-UK extradition treaty to provide "proper" statements.
"They do not appear to be in any way an account of things that witnesses would have said but rather seem to be somebody else's analysis put into the mouths of the witnesses, down to the spelling mistakes," Montgomery said, adding that the documents were "identically reproduced" with not only the same words but also the same typing errors.
Chief Magistrate Emma Arbuthnot will rule on the evidence, following which she is expected to set a timetable for closing arguments and her verdict on whether the UK-based businessman can be extradited to India to face the fraud and money laundering allegations involving his now-defunct Kingfisher Airlines.
Judge Arbuthnot had also sought further clarifications related to availability of natural light and medical assistance at Barrack 12 of Mumbai Central Prison on Arthur Road, where Mr Mallya is to be held if he is extradited from Britain.
The extradition trial, which opened at the London court on December 4, is aimed at laying out a prima facie case of fraud against the tycoon, who has been based in the UK since he fled India in March 2016.
It will also seek to prove that there are no "bars to extradition" and that Mallya is assured a fair trial in India over his erstwhile airline's alleged default of over Rs 9,000 crore in loans from a consortium of Indian banks.
Mr Mallya was arrested by Scotland Yard on an extradition warrant in April, 2017 and has been out on bail on a bond worth 650,000 pounds.
If the judge rules in favour of the Indian government, the UK home secretary will have two months to sign Mr Mallya's extradition order.
However, both sides will have the chance to appeal in higher courts in the UK against the chief magistrate's verdict.