Sure betting or arbitrage betting can be used on all sports markets where there’s is a two-way (win, lose) or three-way market. For example football, rugby, baseball and basketball. For sports such as tennis where there is no outcome for a draw, arb betting is made easier as there are only 2 possible outcomes of the event. Using a surebet calculator helps you calculate the amount you need to wager on both teams and the possible net income.