One of my regular partners likes using dead balls when we play. He usually says they're "still pretty good". Even if I offer to open a new can, we still end up using the dead ones (he doesn't like the brand I prefer). And every time this happens I end up playing like crap. Yes, it's mainly because I normally play like crap but the dead balls make me crappier. I just can't get any rhythm going. After we play I feel like giving up tennis forever. Dead balls suck..!!