The US and China are in a close race for which country has the most gold medals and the most medals all around. I like to hear about the smaller nations that are excited just to send someone to the games. So far, around 55 nations have had at least one athlete win a medal. Many more are at stake today.

Here's what you can't miss:

100-Meter Dash

This promises to be one of the most exciting match-ups of the games. Usain Bolt, who earned the title of "World's Fastest Man" in Beijing, may not be the fastest anymore. Fellow Jamaican Yohan Blake beat Bolt in both the 100-meter and 200-meter races at the Olympic trials. That sets Jamaica up for a good shot at the gold and silver in the 100m but who will be standing on top of the podium?

Women's Weightlifting

It may not have the sex appeal of beach volleyball or swimming but Sarah Robles is the top-ranked weightlifter in the US and hopes to be the feel-good story of the London Games. She managed to live on a $400 a month stipend from USA weightlifting while training for the Olympics. That's a lot of Top Ramen!

Diving

You have to admire these athletes who jump from obscene heights head first into a pool and do it while flipping, twisting and turning all the way down. My palms sweat just watching them climb the ladder up there. The women's 3-meter springboard final is today.

Tennis

After a marathon tennis match -- the longest in Olympic tennis history -- Roger Federer has a shot at getting his country its second gold medal of the games. The Swiss tennis player faces Britain's Andy Murray who had an easier time getting into the gold medal match. The consolation prize is the silver medal.

Find these and other events faster, wherever you go, with the "2012 Olympics" listings on our free mobile app, the BuddyTV Guide!

Rachael Ruble
Contributing Writer

(Image courtesy of NBC)