The combination of fasting for Ramadan and the need for doping control has created a quandary for a pair of Moroccan men's soccer players at the Olympics.
Coach Pim Verbeek says two of his players found it "more or less impossible" to provide a urine sample after the team's 2-2 draw with Honduras on Thursday.
The game was at noon, and the players had not had anything to eat or drink since 2:30 a.m.
Observant Muslims abstain from food and water from sunrise to sunset during Ramadan.
Verbeek says nine of his players are observing the Muslim fasting month. Because the days are long in Scotland, that means they are eating from 9:30 p.m. to 2:30 a.m.