May 2004. It's a beautiful spring evening in Paris. Two Frenchmen, Arnaud Clement and Fabrice Santoro, may be across the net from one another but in reality they're standing toe-to-toe. Nothing can separate them as the best-of-five-sets match is suspended overnight with the score at 5-5 in the final set.

For punters who bought total games, the world is a wonderful place; for those who sold, it's going to be a long night. Eventually, after six hours and 33 minutes - the longest match of the modern era - Santoro triumphs. Total games make up at 71. Never has there been a clearer example of the rewards of spread betting on tennis: like with other sports, when spread betting the more right you are, the more you win.