Organisers of the US Open tennis championship last year sold more than 500,000 of their signature cocktail, “Honey Deuce”. At $23 per glass, the drink grossed $13mn. By contrast, the men’s and women’s champions of the New York City event took home combined prize money of just $7mn.

Donald Trump could end the growing civil war in tennis after the Professional Tennis Players Association filed a lawsuit against the sport's four major bodies.

Some top tennis players are suing the sport’s governing bodies for allegedly running a cartel that caps prize money, limits off-court earnings and restricts competition from rival tournaments.The Professional Tennis Players Association,