Michael Phelps marked the final individual swim of his career with victory in the 100m Butterfly, while 15-year-old Katie Ledecky won the 800m Freestyle on her senior international debut.
Ye Shiwen returned to the Olympic pool after her super-fast 400m Individual Medley swim to easily head the field in the heats of the shorter medley event.
London 2012 celebrates 100 days to go to the Olympic Games today by confirming that millions of people around the UK are getting ready to welcome the world to London.
