(Reuters) -Gretchen Walsh improved on her own American record and became the second fastest woman to swim the 50 metre butterfly after Swede Sarah Sjostrom by clocking 24.93 seconds at the TYR Pro Swim Series meet in Florida on Friday.
The 31-year-old Sjostrom holds the 50m butterfly world record with a time of 24.43, set during the Swedish Championships in July 2014, and has never been beaten in the event at world championships since 2015.
