AUSTIN, Texas—Olympian Katie Ledecky won the 400-meter freestyle and Nathan Adrian won the 100 free on opening night of the Arena Grand Prix in Austin on Friday.

Ledecky won in 4 minutes, 4.46 seconds, about 5 seconds ahead of Danish Olympian Lotte Friis, who touched in 4:09.35. Olympian Chloe Sutton was third in 4:12.11.

"It's a little different than it used to be, not going for best times," Ledecky said. "Now I'm just getting up and racing and finding ways to improve, working on little things like race strategy, saving my legs, those kinds of things."

Adrian overpowered a strong field in the 100 free, touching first in 48.26 seconds. Olympian Yannick Agnel of France was second in 49.31. Conor Dwyer, Adrian's Olympic teammate, was third in 49.39.

"It's a good start to the long-course season," Adrian said. "You see what you did right, see what you did wrong, and you see what moves you need to make going into the competitive summer season."

Simone Manuel of Suger Land, Texas, took the women's 100 free in 54.38. Olympian Allison Schmitt was a half-second behind in second. Megan Romano and Adrianna Vanderpool-Wallace of the Bahamas tied for third in 54.94.

Olympian Micah Lawrence won the 200 breaststroke in 2:25.73. Laura Soger was second and Rachel Nicol took third.

Tom Shields won the 100 butterfly ahead of Eugene Godsoe. Jason Dunford of Kenya was third.

Russ Murdoch of Britain won the 200 breaststroke, Agnel won the 400 free, and Noemie Thomas of Canada won the 100 fly.

The meet on the University of Texas campus runs through Sunday.