Friday 13 June at 12:53 : A formula one grand prix is the most lucrative single sports event on earth.

That is the finding of the annual F1 business and financial guide, Formula Money, and experts Deloitte Sport Business.

They report that every grand prix generates about $230m -- nearly ten times more than the next lucrative single sports events, American NFL football matches.

However, both the NFL ($6.5bn) and America's Major League Baseball ($5.1bn) earn more overall annual revenue than formula one ($3.9bn), because more events are staged each year.

English Premier League football comes next, with $3bn.

For F1, Deloitte Sport Business combined sponsorship revenue, corporate hospitality, broadcast fees and team, circuit and ticket revenue.