I never thought Martingale method can be used in the game sportsbook, but if you do arbitration it very safe .
Martingale will never go well.
this method already exist in dice. you can adjust your odd to be 1.5x and use the same method. but if you calculate the probability, you will be still in the disadvantage.
I already know the Martingale method and I've often used it in dice, but I'm wondering is how to use the Martingale method on Sportbooks?
find tennis game with a strong market predictions as giving odds like 1.5 vs 2.3 , select 1.5. If you lose, find another game with the same odds then increase your bets. this is the simple methode, just follow market prediction.