No contracts have been signed, either with television companies, players, venues or governing bodies. While there is only an outside chance of the competition starting in 2013, it could begin the following year.A source close to the negotiations said on Tuesday: "As far as I know nobody has committed to it yet, so there is still quite a way to go."A similar idea was mooted in Australia three years ago, when Murray and Djokovic were approached, but it died through lack of interest............The format is a simple one: one-set matches in men's and women's singles, as well as doubles, mixed doubles and legends singles. There would be no advantage points played.It sounds a like a lightweight carnival, a glorified exhibition. And playing just one set a day might not be the most arduous workout these players have ever had. But there is the travel and the commitment of time – time most of them currently spend recovering from the bruising demands of their sport.