"The 4:30 wakeup to start stringing tennis rackets is not the most pleasurable thing in the world," Yu said. The rackets Yu strings will be used in about six or seven hours, when the strings start ...

For me, that’s tennis. THE TECHNIQUE Stringing a racket seems easy, but it’s not. I’m very handy and I have the quality of when I want something usually I get it, a strong willpower.

Tennis players rarely break strings anymore, but they still want their rackets to be given a fresh set.