What is the longest 5th set in tennis?

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Tags

1. #match
2. #number
3. #final
4. #remains
5. #score
6. #measured
7. #previous
8. #hours
9. #history
10. #total
11. #three
12. #games
13. #longer
14. #tennis
15. #alone
16. #longest
17. #minutes