Can a soccer player refuse a transfer?

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Tags

1. #player
2. #expires
3. #which
4. #players
5. #contract
6. #windows
7. #during
8. #annual
9. #clubs
10. #twice
11. #known
12. #compensation
13. #foreign
14. #before
15. #transfers
16. #transfer
17. #regulations
18. #periods
19. #their