Four years after he climbed to the top of Olympic achievement, Michael Phelps took the last step he needed to reach the absolute peak.

Ryan Lochte saw off rival Michael Phelps to claim first place in the 400-metre individual medley at the United States Olympic trials.

Six-time Olympic champion Michael Phelps and Katie Hoff set 400m individual medley world records at the US Olympic Trials in Omaha.