I can speak about sports

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Across
  1. 2. time needed to get better after an injury
  2. 5. where tennis is played
  3. 6. decides on the transfer of players
  4. 9. it can be silver or gold
  5. 10. go on a diet to lose it
  6. 12. he whistles the end of the game
  7. 17. great to improve your performance
  8. 18. he/she trains a team or athletes
  9. 19. you can't box without them
  10. 20. it can be running, cycling or driving
  11. 22. to measure your time
  12. 24. you can do that with your foot or your hand
Down
  1. 1. a group of players
  2. 3. the opposite of inside
  3. 4. where football is played
  4. 7. essential for tennis, ping pong or volley ball
  5. 8. you need a bat to play it
  6. 11. food like vegetables or fruits
  7. 13. the referee makes sure they are followed
  8. 14. important to avoid injuries
  9. 15. essential running equipment
  10. 16. when you get hurt, you are...?
  11. 18. special shoes, football players wear them
  12. 21. people go to the gym to keep ...?
  13. 23. it protects your head