Swimming 1500m men freestyle
1st china
2nd S korea
3rd Jpn managed to overtake Viet during last lap.
1st lead all the way. Is like horse long distant racing. When the difference is too wide there is no way to sprint to catchup.
Morale of the story.
Always train to lead as much as you can . If you cannot do this and see that your opponents can, then forget about the gold medal even before the event start.