Phelps, hoping to add to his stunning tally of 18 Olympic gold medals at the Rio Games in August, swam the first 50m in 24.62sec and held off fellow American Tom Shields for the victory. Shields clocked 52.35, with Brazilian Henrique Martins third in 52.59.
Germany’s Aliena Schmidtke won the women’s 100m fly in 59.94. Yuliya Efimova of Russia produced a season’s best of 1:05.70 in winning the women’s 100m breaststroke.
In the men’s 100m breaststroke, Brazil’s Joao Gomes edged American Josh Prenot at the wall, winning in 1:00.64 to Prenot’s 1:00.66. Brazil’s Felipe Lima was third in 1:00.73.
Katie Ledecky won the 200m freestyle in a time of 1:55.73 — second-fastest in the world this year behind the 1:54.43 she posted in Austin in January.
“It felt pretty good,” Ledecky said.”I guess it was about where I thought I would be time-wise.I worked this morning and this afternoon on some of the details I’ve been working on around my turns.I was pleased with how I put it all together.”