Regan Smith sets 4th 100 back Olympic record of meet in semi
![Regan Smith sets 4th 100 back Olympic record of meet in semi](https://ktvz.b-cdn.net/2021/07/OLY20_SWW100BK_G_SMITHRECORD_HLF_210726_FINAL-1440x810.jpg)
NBC Olympics
After the women’s 100m backstroke Olympic record was broken three times in prelims, Regan Smith lowered the mark once more in her semifinal, advancing as the top-ranked swimmer to the final.