Why is it hard to play tennis on clay?

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Tags

1. #tennis
2. #slide
3. #court
4. #complete
5. #energy
6. #lines
7. #coming
8. #often
9. #their
10. #courts
11. #higher
12. #preserve
13. #players
14. #rolled
15. #frequently
16. #since
17. #bounce
18. #instead
19. #painted
20. #playing
21. #shots
22. #slower