LONDON, Dec. 18 (Xinhua) -- Michael Phelps helped U.S. team set a new short course world record in 3 minutes 20.71 seconds in the 4x100m medley relay at the "Duel In the Pool" event in Manchester of England on Friday.

    The previous record of 3:23.33 was set by Canada in August this year in Leeds.

    Phelps was joined by Nick Thoman, Mark Gangloff and Nathan Adrian in the U.S. team.

Michael Phelps of the U.S. swimming team celebrates after winning the men's 4x 100 medley relay during the Duel in the Pool competition at the Manchester Aquatics Centre in northern England December 18, 2009.