I was thinking, hards and grass are really too easy. More than half of the players that enter the tournaments on those surface end up winning it. Historical average says that on hards if a player enters a tournament, he has a 56,47% chance of winning it. On grass the average is even higher, at 67,8%. Back in the old days it was still worst, players playing on grass had more than 75% of chance of being champion. That's why major tournaments started to be played by 128 players only, they used to be played by 256, but in the 1957 Wimbledon a whooping number of 255 players won that tournament, and organizers could not produce enough trophies. Chances are, if they had not slowed down the surfaces, that even with 128 players entering majors we would have more than 200 different winners at each edition.