For medal count-enthusiasts, the 2012 Olympics featured a heavyweight bout between the United States and China. The two nations seesawed for the lead throughout the Games, with the U.S. pulling away in the final days.

London is not the first city to host a nail-biting race for most medals. Eight previous Summer Olympics have been decided by ten medals or less. All eight have involved the U.S., with the Americans claiming the top spot four times.

See how this year's down-the-wire finish ranks with some of the closest medal counts in history.

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