Vijay Mallya has said that he fears being murdered if he is put in an Indian jail.
Over a corruption case, the Indian government wants to extradite the Force India team owner and boss from Britain.
The Times of India reports that Mallya is arguing to a London court that he fears being murdered, citing a case involving a female prisoner in June.
Mallya's legal team also said that "torture in Indian jails" is another strong argument against extradition.
"He fears for his life in case he is sent back," a source said.
However, an official insisted: "The UK court will take into account a sovereign guarantee given by the government of India that Vijay Mallya would be kept in a safe jail environment at Arthur Road jail [in Mumbai]."
Extradition proceedings will begin at Westminster Magistrates' Court on Monday.