Gretchen Walsh won her first individual long course world title by nearly breaking her own 100m butterfly world record. Walsh clocked 54.73 seconds at the World Swimming Championships, just off her own record of 54.60 from May 3. She owns the top eight times in history.

The United States team at the swimming world championships in Singapore is battling a case of “acute gastroenteritis” that compromised performances on the opening day of eight days of competition in t