LONDON (AP) — 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 (at)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 (at)michaelphelps. (hash)legend" — U.S. women's soccer player Heather Mitts, http://www.twitter.com/HeatherMitts

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"It's now official (at)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. (hash)toogood" — British tennis player Laura Robson, http://www.twitter.com/laurarobson5