Amazon.com Inc. is in the midst of a bitter legal fight with Indian conglomerate Future Group, which in August sold its retail assets for $3.4 billion to Reliance Industries Ltd., owned by Indian billionaire Mukesh Ambani.

Amazon, founded by billionaire Jeff Bezos, has argued that the deal breaches agreements reached in 2019 when Amazon invested nearly $200 million in a Future unit. Those agreements included noncompete clauses and a right to first refusal clause that prevented the Indian company from selling its retail assets to anyone on a "restricted persons" list, which included Reliance.

The dispute has been described as a fight between two of the world's wealthiest men—both competing for a larger share of India's retail market. The two companies are vying for a larger share of India's growing e-commerce market.

Amazon brought its case to the Singapore International Arbitration Centre (SIAC), which last month issued an injunction ordering Future Group to put its plans for selling its retail business to Reliance Group on hold pending a final judgment.

A former solicitor general of India appeared for Amazon; Harish Salve QC of Blackstone Chambers appeared for Future Retail; and Singapore lawyer Davinder Singh appeared on behalf of Future Coupons, the unit in which Amazon invested.

But Future Retail claims the SIAC order wasn't binding, and on Nov. 7, it asked the Delhi High Court to order Amazon to stop interfering in its $3.4 billion asset sale deal, arguing that the U.S. company was "misusing" the arbitration order to interfere in the Reliance deal, according to Future's filing with the National Stock Exchange of India.

The filing document also stated that while all entities who were part of the arbitration proceedings have been listed as parties to the New Delhi suit, Future Retail is seeking relief only from Amazon.

Future Group is being advised by the Indian firms Trilegal and Naik Naik & Co. Amazon is represented by Indian firms AZB & Partners and P&A Law Offices, and by Singapore firm WongPartnership.