The Olympic marathon swimmers have spent years waking up early, going to the pool to swim lap after lap, and training up to 6 hours a day.

The sacrifice is clearly evident.

But there are also men and women who have spent years and, in many cases, decades waking up early, going to the pool and sacrificing much in the pursuit of Olympic success.

These are the coaches of the 25 male open water swimmers qualified for the Olympic 10K Marathon Swim on August 10th in the Serpentine in Hyde Park.

For complete and comprehensive coverage of the Olympic 10K Marathon Swim on August 9th and 10th, visit here.

1. Coach Nikos Gemelos of Spyros Gianniotis of Greece

2. Coach (brother) Stefan Lurz of Thomas Lurz of Germany

3. Coach Dmitry Belov of Sergey Bolshakov of Russia

4. Coach Tim Murphy of Alex Meyer of USA

5. Coach Colin Braund of Ky Hurst of Australia

6. Coach Carlos Carnero and Coach Carles Subirana of Francisco José “Kiko” Hervás of Spain

7. Coach Brugse Zwenkring of Brian Ryckeman of Belgium

8. Coach Lucien Lacoste of Julien Sauvage of France

9. Coach Lidiya Vlasevskaya of Vladimir Dyatchin of Russia

10. Coach Hannes Vitense of Andreas Waschburger of Germany

11. Coach Dave Salo and Coach Catherine Vogt of Oussama Mellouli of Tunisia

12. Coach Ron Jacks of Richard Weinberger of Canada 

13. Coach Krassimir Toumanov of Petar Stoychev of Bulgaria

14. Coach Emanuele Sacchi (shown above) of Valerio Cleri of Italy

15. Troyden Prinsloo of South Africa

16. Coach Kenichiro Mori of Yasunari Hirai of Japan

17. Coach Valentina Sadikova and Coach Izmail Sadikov of Igor Chervynskiy of Ukraine

18. Coach David Martinez of Ivan Enderica Ochoa of Ecuador

19. Coach Rui Magalhaes, Coach Elio Terrivel and Coach Felipe Coelho of Arseniy Lavrentyev of Portugal

20. Yuriy Kudinov of Kazakhstan

21. Coach Juan Carlos Tenorio of Erwin Maldonado of Venezuela

22. Coach Rick Walker of Csaba Gercsak of Hungary

23. Coach Rick Walker of Mazen Aziz of Egypt

24. Coach