Cseh was trying to keep pace with fellow competitors like US swimmer Michael Phelps, the Olympian who has won the most gold medals ever (22 and counting). Phelps won the 200-meter butterfly by just .04 of a second -- the closest margin of victory in history. "He led the whole way, but guys were chasing him right down to the end," said Pretty about Phelps. "One of the best displays of swimming I've ever seen."
Sjöström came up short against rising US swimming star Katie Ledecky (near right), who won a gold medal in 200-meter freestyle and also in the women's 400-meter freestyle. The 19-year-old has won three gold medals and was in contention for a fourth as of Friday.