Minnows among the sharks

While swimming legend Michael Phelps flies first class, earns millions from lucrative sponsorship deals and is aided by scientific training methods, spare a thought for the sport's plucky minnows.

For swimmers from nations like Mongolia and the Maldives, simply finding a pool to train in is a challenge. Competing at the Rio Olympics is a truly staggering achievement.

In an indication of the difficulties athletes in the Maldives face, swimmers have to train in the Indian Ocean - often at night.