Matthew Cowdrey of Australia has won S9 100m freestyle gold for the third Paralympics running.
Cowdrey was behind Hungary's Tamas Toth at the turn but flew through the final 50m to take yet another gold medal.
Cowdrey's 55.84s was half a second outside the world record, with Toth touching the wall in 56.46s.
Toth's compatriot Tamas Sors took a surprising bronze medal, edging out the rest of the field with 56.69s.