Betfair&Tennis How To Make Extra Money For this tutorial I will make use of Betfair – they are the biggest and most popular player on the market. Never used Betfair before? You can find everything you need to know in their extensive help section with nice video tutorials and stuff. Trading on tennis is all about spotting the right opportunity. And when you find one, all you have to do is open and close your trade and collect your money…it’s fun, easy and profitable! All examples and screenshots are showing EUR/€…but obviously my methods will work just the same way in any other currency.