Hungary's 'Iron Lady' shows her mettle in 400m

Katinka Hosszu filled a glaring gap in her resume on Saturday by making her first Olympic medal a gold - and with a stunning world record to boot.

The Hungarian shattered the world record in the 400m individual medley, seizing control from the start and winning in 4 min 26.36 sec.

She eclipsed the previous record of 4:28.43 set by China's Ye Shiwen en route to gold in London four years ago, when Hosszu was relegated to fourth.