Americans Michael Phelps and Brendan Hansen broke their own world records at the Pan Pacific Championships on Sunday.
Phelps won his fifth gold medal of the competition in the 200-metre individual medley, his time of 1:55.84 beating his previous mark of 1:55.94 set three years ago in Maryland.
Hansen lowered his own record in the 200 metres breaststroke, winning the event in 2:08.50 to eclipse his previous time of 2:08.74.
'We make it look easy but it's really hard,' Hansen told reporters. 'A lot of hard work went in to that.'
