The global tennis industry in numbers
22 January 2014 Last updated at 00:05 GMT
The world of elite tennis is in the spotlight in Melbourne, as the Australian Open moves into its dramatic final stages.
But what are the numbers behind the tennis players, products, and events which make up this major global sporting industry?
By Pia Gadkari and Bill Wilson
Sources: Sports Marketing Surveys Inc, Forbes, Tennis Industry Association UK, Sports Marketing Surveys USA, ITF, Tennis Industry Association, Australian Open, Melbourne Tourism.