RIO DE JANEIRO -- Michael Phelps has to clear out more space in his medal case.Time to make room for gold No. 19.With yet another dazzling performance, the most decorated athlete in Olympic history added to his staggering haul Sunday night in the 4x100-meter freestyle relay, giving the United States a lead it never relinquished.Defending Olympic champion France was leading when Phelps dove into the water on the second leg, taking over for leadoff swimmer Caeleb Dressel. Even though the 100 free isnt one of his specialties -- hes never swam it at the Olympics -- he blazed down and back in a stunning 47.12 seconds, a time that was faster than all but the three anchors on the medal-winning teams, three of the best in the world at that distance.Ryan Held protected the lead before giving way for Nathan Adrian, Americas best sprinter.At that point, it wasnt really in doubt.But Phelps wasnt taking any chances, pounding the starting block and shouting toward Adrian as the anchor made the turn for home.When Adrian touched the wall first, posting a winning time of 3 minutes, 9.92 seconds, Phelps thrust his right arm in the air and looked toward his infant son Boomer, nuzzling in the arms of his mother Nicole Johnson, the roaring crowd blocked out by noise-canceling headphones.Little Boomer wont remember what his daddy did this night.But that gold medal will never let him forget.France took the silver in 3:10.53, while Australia claimed the bronze in 3:11.37, holding off a Russian team that was booed during the introductions -- a reminder of the drug scandal that has rocked the nation. Vladimir Morozov, initially banned from the Olympics, was one of Russias relay swimmers.It was quite a night for the Americans, who were shut out on the golds on the opening night of swimming.Racing nothing but the clock, Katie Ledecky gave the U.S. its first victory by crushing her own world record in the 400 freestyle.The result was totally expected. The unassuming teenager from suburban Washington has dominated the longer freestyle events since winning gold in the 800 free at the London Olympics as a 15-year-old.The only drama was whether shed take the world record even lower.Her powerful stroke quickly made that a moot point, too.Ledecky kicked off the first wall with a lead of nearly a body length and steadily pulled away from the overmatched field -- as well as the world-record line superimposed on the video screen.Her arms churning effortlessly through the water, Ledecky touched nearly 5 seconds ahead of her closest pursuer and quickly whipped around to look at the scoreboard.When Ledecky saw the time -- 3:56.46 -- she let out an uncharacteristic scream and shook her right fist. She crushed the mark of 3:58.37 that she set nearly two years ago on the Gold Coast of Australia, and had been chasing ever since.I was pumped, Ledecky said. Thats what I wanted and I had been so close to breaking that all year, the past two years. I knew I was due for a breakthrough.Shes just getting warmed up.Ledecky, who added gold to the silver she won in the womens 4x100 free relay, is also favored in other two individual events: the 200 and 800 free. In addition, she could pick up another gold in the 4x200 free relay.It was a night of world records in Rio.Britains Adam Peaty set his second mark in as many nights in the 100 breaststroke, while Sarah Sjostrom of Sweden eclipsed her own mark in the 100 butterfly.Peaty won with a time of 57.13 that shattered the mark of 57.55 he set in the preliminaries. He cruised away from Cameron van der Burgh of South Africa, the defending Olympic champion who took silver this time in 58.69. The bronze went to Cody Miller of the United States, whose time of 58.87 held off teammate Kevin Cordes.The crowd went into a frenzy at the sight of two Brazilians in the final. But Joao Gomes finished fifth and Felipe Franca was seventh.Sjostrom led right from the start of the fly and touched in 55.48, knocking off the mark of 55.64 she established at last years world championships. She sat on the edge of the deck, pumping her arms in the air, and then appeared to be overcome by tears as she climbed to her feet.This was her first Olympic medal. Sjostrom finished fourth in the 100 fly at the London Games four years ago, missing out on the bronze by just 23-hundredths of a second.Penny Oleksiak of Canada took the silver in 56.46, edging out defending Olympic champion Dana Vollmer. The American, who had her first child 17 months ago, settled for the bronze in 56.63.Already, six world records have been set in Rio.The only mark that didnt fall Sunday was the mens 4x100 free relay.Phelps and the Americans didnt mind a bit.---Follow Paul Newberry on Twitter at www.twitter.com/pnewberry1963 . His work can be found at http://bigstory.ap.org/content/paul-newberry . 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Set The Bar High may turn out to be aptly named.Even before a winning debut at Warrnambool earlier this month connections were thinking high.Trainer Symon Wilde is already looking ahead to the South Australian Derby in the autumn but first Set The Bar High will attempt a city victory in the Planet Ruler Handicap (1400m) at Flemington on Saturday.Win, lose or draw the three-year-old is likely to be put aside after Saturday with Wilde keen to map out a Derby program..The Set The Bar High story dates back to his dam, Youthful High, who was trained by Wilde and his father Bill to win seven races for the pair after starting her career in South Australia with Tom Dabernig.We raced the mother years ago and she was a really good mare for us, Wilde said.We ended up selling her as a broodmare when her career had finished but we ended up buying a couple of the foals back which were Itz A Debacle and Set The Bar High.Some of the same owners of Youthful High have bought into this horse.It was a good little journey with Youthful High and this horse looks like hes got her ability, more so than what the older ((half) brother has.ddddddddddddilde considered running Set The Bar High over 1600m at Flemington last week but reasoned an extra week would be more beneficial.He also saw enough speed in the three-year-old in his debut win to suggest Saturdays 1400m trip was ideal.But long term he has his eye on longer races as Youthful High was adept over a middle distance and was placed at 2600m at Flemington.The mare was a stayer and I reckon this bloke is similar, Wilde said.We were surprised with how much speed he showed at Warrnambool where he sat up on the pace and we thought an extra week and a fortnight between runs might suit him a bit better.Stablemate Sister Kitty Mac will try to extend her winning sequence to three when she lines up in the Isca Handicap (1100m) following victories at Dunkeld and Werribee.Shes a speedy, very quick horse and I think thats played into her hands in her two wins, Wilde said.She is talented. Not many win their maiden and then a (benchmark) 64. ' ' '