Olympic champion Lukas Martens of Germany broke the men's 400-meter freestyle world record that had stood since 2009.

Olympic champion Lukas Martens of Germany has broken the men’s 400-meter freestyle record at the Swim Open Stockholm ...

STOCKHOLM — Olympic champion Lukas Martens of Germany has broken the men's 400-meter freestyle record at the Swim Open Stockholm. Martens became the first swimmer to break the 3 minute ...

STOCKHOLM (AP) — Olympic champion Lukas Martens of Germany has broken the men’s 400-meter freestyle record at the Swim Open Stockholm. Martens became the first swimmer to break the 3 minute ...