One week ahead of her planned testimony, Ivanka Trump has appealed Judge Engoron's decision to require her to testify in person at the Trump Organization's fraud trial.

Ivanka Trump's lawyer Bennet Moskowitz asked an appellate court to decide whether Engoron has jurisdiction to compel her testimony and whether the trial subpoenas issued by the New York attorney general were properly served.

Ivanka Trump, who is not a defendant in the case, is currently scheduled to testify next Wednesday as the final witness in the attorney general's case before the defense presents its case.

Donald Trump Jr. has arrived at the New York State Supreme Courthouse with his attorney.

Unlike his father and his brother Eric Trump -- who have visited the courtroom to watch the proceedings – Donald Trump Jr. has not stepped foot inside the courthouse for the trial until today.

A Trump Organization executive vice president, Trump Jr. is scheduled to testify in the case this afternoon.

Defense lawyer Jesus Suarez spent the first hour of his cross-examination working to cast doubt on expert Michiel McCarty's analysis, which found that Trump defrauded lenders out of $168 million in interest.

"Who created the universe of documents for you to review? It was the New York attorney general, right?" Suarez said before launching into a rapid-fire succession of questions regarding which lenders McCarty had spoken to in the course of his analysis.

"Did you ever interview anyone from Deutsche Bank?" Suarez asked.

"No," McCarty said.

"Did you ever interview anyone from Ladder Capital?" Suarez asked.

"No," McCarty repeated.

"Did you ever interview anyone from Mazars," Suarez asked.

"No," McCarty responded.

"Did you ever interview anyone from the Trump Organization?" Suarez asked.

"No," McCarty said again.

Only 15 minutes into what is expected to be a three-hour cross-examination, Judge Arthur Engoron snapped at defense lawyer Jesus Suarez for asking redundant questions.

"I see why this is going to take two or three hours. Some questions become three or four more questions," Engoron said, interrupting the cross-examination to request that Suarez shorten his questions.

That prompted Trump lawyer Chris Kise to criticize Engoron for placing an unfair standard on the defense team.

"You never give them speeches. You never limit their questions," Kise said about Engoron's approach to the attorney general's legal team. "I think it's unfair."

Kise stressed that the cross-examination of the state's sole expert witness is particularly important since his testimony is likely to play into the judge's calculation of Trump's potential fine.

"This witness is the only witness they have that even hints ... about ill-gotten gains," Kise said.

Engoron, however, refused to back down.

"I stand by my rulings and statements," the judge said.

Deutsche Bank was a serious company in business with Donald Trump to make money, defense attorney Jesus Suarez said during his cross examination of former Deutsche Bank executive Nicholas Haigh.

At the height of its relationship with the Trump Organization the company loaned Trump over $378 million, and failed to commission independent appraisals of Trump's properties, Haigh acknowledged. While the bank listed lower estimates for the value of Trump's assets year after year, it continued to do business with Trump and his company.

"We ... the bank hadn't done all the due diligence one would do in the sense of the opinion of value you see in an appraisal," Haigh said, at one point agreeing with the defense's characterization that the bank's internal value services group conducted "sanity checks'' on the numbers.

The direct examination of Haigh by state attorney Kevin Wallace also left a central question about Deutsche Bank's activity unanswered.

In a letter to the court and in previous arguments, lawyers for the attorney general suggested that Haigh might have turned away Trump's business if he had known that Trump's assets were inflated in value.

"As this Court noted during summary judgment arguments, Mr. Haigh testified during OAG's investigation that he may not have authorized lending to the borrower if he had at that time been aware of the inflated asset values contained in Mr. Trump's SFCs [statements of financial condition]," a lawyer for the attorney general wrote to the court in a letter last week.

Wallace never directly posed the hypothetical to Haigh during his direct examination, leaving the question unresolved.

Court subsequently adjourned for the day, with Suarez telling the court he plans to continue his cross examination of Haigh through Thursday afternoon.