Which Masters 1000 has Federer not won?

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Tags

1. #carlo
2. #federer
3. #despite
4. #never
5. #wawrinka
6. #nadal
7. #monte
8. #mantilla
9. #final
10. #djokovic
11. #roger
12. #masters
13. #similarly
14. #appearances
15. #these
16. #maestro
17. #eluded