I don't think it can be done. Take a look at the Wednesday tennis picks and the 90% of them were losers ( Karlovic, Melzer, Ginepri, Hanescu, Minar, etc ). And that happens most of the time.
Now I'd like to know about these other methods where you can reliably increase your bank without having to pick winners and get a liability on your bank in the first place? When people picked Karlovic they had to risk more than 5 times their stake for 1 part of profit. Picking underdogs doesn't seem to work either. You can study a match all you like and be 100% sure that it's a winner and it can still lose.
The very idea that you can use that as a reliable income to replace a job is ludicrous. It's gambling, you risk your money everytime you place a bet, so what are those trusted capping methods that work everytime?