It was always ridiculous to me how Stan consistently smacks serves in the 130s while being 6 foot even. The dude is strong. Check out the massive upper body rotation on his backhand. I think that's a relatively new thing for one handed backhand technique.
Avoid Youtek Speed 16x19. Absolute garbage. Ridiculously stiff and lacked power. That one racquet made me steer away from Head for good, although I must admit the new Graphene Pro (Novak's) feels pretty nice.
I've seen people with shiny strings and the balls that they hit come at me ridiculously weird. Once it bounces it's like a freaking geyser. I'm gonna have to say yes.
I remember this from history class last year. China's navy and shipbuilding was the most advanced in the 15th century, but political turmoil prompted records to be destroyed and China retreated into isolationism.
Besides the obvious double faulting, making UEs at the net is unacceptable. It's a feared position meant to exert power over the court. You can't miss.