Sure Bets — TOP 10 With sure bets you should always win. Use the calculator icon to count stakes. Sure bets are calculated from across all bookmakers we cover on OddsPortal. We only list 10 most profitable sure bet opportunities. Want more than 10 sure bets? GET MORE >> Sure Bets Help: Make certain profit from sports betting by placing sure bets, sometimes also called arbitrage bets or arbitrage betting.