Anil Ambani, once ranked as the sixth richest person globally, faces setbacks as the Supreme Court reverses an Rs 8,000 crore arbitral award in favor of a firm in his group, Reliance Infrastructure. The award, related to a concession agreement with Delhi Metro Rail Corp in 2008, now requires nearly Rs 3,300 crore repayment by Ambani's firm. This development adds to the financial challenges faced by his group amid debt restructuring.