Ricardo Prado of Brazil set a world record tonight in winning the 400-meter individual medley competition at the World Aquatic Games.

Prado finished the race in 4 minutes 19.78 seconds, cutting .27 seconds off the previous record of 4:20.05 set in 1978 in Berlin by Jesse Vassallo of the United States. East Germany's Jens-Peter Berndt won the silver with 4:23.02 and Sergei Fesenko of the Soviet Union was next in 4:23.29.

Earlier, American Greg Louganis won the men's springboard diving competition. Soviet divers Sergei Kuzmen and Alexander Portnov finished second and third. Louganis gained 752.67 points in the 11 rounds of the final, while Kuzmen was awarded 636.15 and Portnov 631.56.

Reuter reported that Louganis' score was the highest overall ever in major competition. Said Louganis' coach, Ron Brown: "In the history of diving that's probably the greatest performance ever put in on a springboard."

Matt Gribble of the United States clocked 53.88 seconds in the men's 100-meter butterfly final to break the meet record of 54.09 he set in today's heats and win the gold medal.

Annemarie Verstappen of the Netherlands won the gold medal in the women's 200-meter freestyle with a time of 1:59.53. Svetlana Varganova of the Soviet Union took the gold in the women's 200-meter breaststroke.