American Michael Phelps and Australia's Jessica Schipper have both broken world records in the 200 metres butterfly at the Pan Pacific Championships.

Schipper – the 100 metre butterfly world champion clocked 2 minutes 5 point 40 seconds – nought point 2-1 seconds quicker than the previous record set at last year's finals. Twenty one year old Phelps broke his own 200 metre record clocking a time of one minute 53 point 80 seconds.