[QUOTE=helloworld;4126865]People don't realize how much heavier the ball today is compared to the 80s or 70s.[/QUOTE
Several years ago I found an unopened can of Penn hard court balls hidden in my basement that I had bought in the late 70s. I tried them out and after a set and a half they were so skinned that they were not playable. The covers just weren't as heavy/durable as today's balls.