Katharine Berkoff outlasts Regan Smith for 50m backstroke win at Toyota US Open | NBC Sports

Reigning world champion Katharine Berkoff lived up to her billing at the Toyota US Open in Austin, fending off Regan Smith for the win by nearly a quarter-second. #NBCSports #Swimming #KatharineBerkoff #ReganSmith » Subscribe to NBC Sports: https://www.youtube.com/nbcsports?sub_confirmation=1 » Watch Live Sports on Peacock: https://peacocktv.smart.link/v82e9dl56 NBC Sports Group serves sports fans 24/7 with premier l...