Rebecca Soni has smashed the world record in the women's 200m breaststroke at London 2012.
The American stormed through her semi-final and left her competitors seconds behind, finishing in 2:20.00.
Satomi Suzuki was more than two seconds behind Soni, but goes through to the last eight as the third-fastest qualifier.
Soni's biggest rival in the final is likely to be Rikke Pedersen of Denmark, who won her heat with a time of 2:22.23.
The women's 200m breaststroke final takes place tomorrow evening.
