I was playing dubs today, and my partner flicked up a lob, and to be fair, it was a rubbish lob. I moved back 2 steps, to give myself more chance of returning the smash. Opponent smacks it, HARD, straight into the floor, ball bounces up and catches me right in my meat and two veg. Needless to say I feel on the floor, clutching my nads for dear life. It felt like theyd been smacked into my stomach. I think that's THE worst tennis thing that ever happened to me.