Elon Musk isn’t the only billionaire coming toe-to-toe with the founder of Amazon. Mukesh Ambani, the richest man in India, controls Reliance Industries Ltd, which has become embroiled in a court battle with Amazon. Both companies have interests in the same retailer, Future Group, as a means of dominating the Indian consumer goods market, which is reportedly worth $1 trillion (£718bn). Amazon owns a 49% stake in Future Coupons, giving it indirect ownership of a stake in the company, while Reliance Industries bought $3.4 billion-worth (£2.4bn) of assets from the Group earlier this year. Amazon objected to the sale and it was put on hold, before a New Delhi high court overturned the decision. Amazon is now appealing again, and the case will go to the Supreme Court.