Winner breaks but as has been mentioned, 10-ball needs to be the game.
The switch over to 10-ball and ditching of 9-ball as the main pool game played at the pro level cannot take place fast enough IMO. The US Open, the DCC, the Reno Open, these need to be switched over because 9-ball has been a messed up game for a long time with bad breaking mechanics and has proven itself to be far too easy for the top 50 players in the world to allow the truly best players to clearly pull away from the pack.
I know some will be shocked to think of the US Open making such a shift or the DCC but honestly 9-ball is a large reason we are currently in the lowest point of the history of this sport, and trust me we are really there. We have no 9-ball world championships, we have almost no sponsership, there is no professional tour in America, very few true professional pool players in America, ect...
This sport is dying, it has never been at a lower point then right now, we lucky people of today are getting to see it's all time low since the game became a sport in the first place. Changes need to be made and those changes need to be significant or it is simply going to keep withering away until we have little left to even try to salvage by making a major change at that point.