The battle for the overall medal lead at the 2012 Summer Games continues to be a two-country race, as the United States and China each continue to leave the rest of the world in their dust.

Now with a 54-53 lead overall through eight days over China, Team USA chipped in a total of 11 medals on Saturday from London but were inexplicably matched medal-for-medal by their Chinese counterparts. In addition to a pair of golds on the hard court in tennis from Serena Williams (women's singles) and Mike and Bob Bryan (men's doubles), the Americans also received a gold from female shooter Jamie Gray in the women's 50m rifle, 3 position event.

Here are the leaders through eight days:

1. United States, 54 (26 gold, 13 silver, 15 bronze)

2. China, 53 (25, 16, 12)

3. Great Britain, 29 (14, 7, 8)

4. Russia, 28 (3, 15, 10)

5. Japan, 24 (2, 10, 12)

For a full medal count tracker from Sports Illustrated, go here.

Stay with this StoryStream for more coverage of local athletes at this year's games, and be sure to check out SB Nation's Olympic hub for more coverage from London.