1. He's the Williams sisters' brother you didn't know about.
2. Tennis loves its bad boys.
3. He has ZERO respect for authority.
4. His skills are deadly.
5. No one has ever made playing tennis look this cool.
6. He's smooth.
7. He’s gracious in defeat.
8. Because more athletes should wear white denim.
9. He knows how to deal with disruptive fans.
10. That hair.
All GIFs provided by HBO.