Gretchen Walsh sets 100m butterfly world record for third time in 12 months

• American clocks time of 54.33 seconds in Florida

• 23-year-old owns 13 fastest times in her event

Gretchen Walsh bettered her own 100m butterfly world record for the third time in 12 months as she clocked 54.33 seconds in Fort Lauderdale, Florida, the same event where she became the first woman to breach the 55-second mark.

The reigning world champion now owns the 13 fastest times in the event’s history.