The United States set the world record in the 4x100 freestyle mixed relay, clocking 3 minutes, 18.48 seconds in the swim ...

In other events, Gretchen Walsh became the first American woman to ever win gold at the world championships in the 50m ...

Katie Ledecky remains a dominant force in competitive swimming. The Olympic swimmer, 28, won her seventh consecutive world ...

Katie Ledecky remains unbeaten in the 800 freestyle, while the Americans set a world relay record and piled up three gold ...

Katie Ledecky continued her dominance in the 800m freestyle event at the world championships on Saturday by winning her ...

Katie Ledecky stubbornly refused to give up her 800-meter freestyle crown Saturday at the world championships in Singapore, ...

Katie Ledecky won her seventh world title in the 800 meter freestyle on Saturday, Aug. 2 at swimming's world championships, ...

Canadian swimming phenom Summer McIntosh was unable to beat American star Katie Ledecky in the women's 800-metre freestyle at ...

The epic battle was one of the greatest races in history. In the end, the 28-year-old American captured her seventh world championship in the event.