so, whats the hack? 
Please re-read next time.It's not a hack but you can take advantage of it. However, at directbet, you can apparently wait until you see a player hurt in the second or third set and then bet the other guy, and you'll win.
If a player is hurt it's not a promise that the match will be adjourned, it also happens sometimes that after a little treatment the play resumes and unless the other guy is winning you're going to lose that bet. And if you're betting after the players retires, your bet won't be accepted.
So I just lost a bet that I placed "live" after a tennis match has started. It appears that the player I bet on retired after I placed the bet and then the bet counts as a loss. The rules say if one set is completed then the bets will stand. I bet this match in the second set and the player retired in the third set.
Other online betting sites I usually play at say if you bet live tennis then the match must complete, without retirements. However, at directbet, you can apparently wait until you see a player hurt in the second or third set and then bet the other guy, and you'll win. Seems like a weird rule setup, but hopefully someone can take advantage of it.
Considering you are betting live wouldn't the bet not even be accepted if you bet after seeing the player retire ? From my previous experience bets take time to show up and be accepted on their site and they are really fast with changing the odds or making it not available. Other online betting sites I usually play at say if you bet live tennis then the match must complete, without retirements. However, at directbet, you can apparently wait until you see a player hurt in the second or third set and then bet the other guy, and you'll win. Seems like a weird rule setup, but hopefully someone can take advantage of it.
Right, I think the bet will stay in 'Pending' form until it is decided whether the game will continue or not and if it doesn't the bet will be rejected.