57-year-old Rishi, a British national, is facing CBI probe in connection with the alleged irregularities in supply of all-terrain Tatra trucks to public sector Bharat Earth Movers Limited (BEML) by his firm Tatra-Sipox UK.
Special CBI Judge Talwant Singh reserved the order after hearing arguments from the counsel for Rishi and the CBI.
"Put up for order for tomorrow," the judge said after both the sides concluded their arguments.
During the hearing, CBI's prosecutor V K Sharma opposed Rishi's plea saying the probe into the case is still going on and most of the investigation is to be carried out in the UK where the accused wants to go.
"The purpose of the probe will be frustrated if he (Rishi) does not come back to India," Sharma said.
The agency also opposed Rishi's plea apprehending that he may flee if he is allowed to go to the UK and might destroy the crucial evidence.
Rishi had earlier moved the court for its permission to go to the UK for four weeks for medical treatment and business purpose.
He has also sought a direction to the CBI to suspend the look out circular, issued against him on March 31 this year.
Appearing for Rishi, senior advocate Atul Nanda told the court that all the evidence in the case is documentary and is in the CBI's possession as well as in the government's record.
"I (Rishi) cannot tamper with the evidence or other documents related to this case," Nanda said, adding, "all the evidence is with you (CBI), how can I destroy it?"
