Michael Phelps' swimming career ended Saturday night in predictable fashion - a gold medal, the 18th of his Olympic career and 22nd medal overall. Here's a selection of reaction from the Twitter world in the minutes that followed after Phelps and the U.S. won the 4x100-meter medley relay in his final race:
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''Wow @MichaelPhelps wow. He's gone somewhere no man has ever been..Greatest Olympian Athlete Ever'' - Miami Heat guard Dwyane Wade, http://www.twitter.com/DwyaneWade
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''Amazing!!'' - 2008 Olympic gymnastics gold medalist Nastia Liukin, http://www.twitter.com/NastiaLiukin
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''Lovely ending to a historic career for @michaelphelps. #legend'' - U.S. women's soccer player Heather Mitts, http://www.twitter.com/HeatherMitts
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''It's now official @MichaelPhelps you are the best swimmer I know. You're more than the GOAT, you're a national treasure!'' - Heisman Trophy winner and college football analyst Desmond Howard, http://www.twitter.com/DesmondHoward
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''Phelps wins an 18th gold medal. Pretty nice way to retire. He is definitely my choice for greatest Olympian of all time. #toogood'' - British tennis player Laura Robson, http://www.twitter.com/laurarobson5
