I've bet on tennis for a good few years now and I've learned that long odds come in more often than in for example football. If you are looking for good value long odds I suggest you start monitoring tennis, especially womens tennis. I have no facts to back this up, but it is OFTEN the case that player A goes 1 set up and then messes it up in the 2nd set. By then you will have backed player B. Long story short but wanted to share.