RIO DE JANEIRO - Swimmer Katie Ledecky's bid to sweep the longer freestyle events at the Rio Games is on track.

A night after winning the 400-meter free in world-record time, Ledecky has posted the top qualifying time in the 200 free preliminaries.

The American teenager won her four-lap heat in 1 minute, 55.01 seconds on Monday.

Emma McKeon of Australia was second quickest in 1:55.80.

Missy Franklin, the female swim star of the 2012 London Games, advanced to the late-night semifinals in 12th place with a time of 1:57.12. It was Franklin's first race in the pool on the third day of swimming.

Also advancing was Italian star Federica Pellegrini.