LaShawn Merritt pulled up early in the 400 meter semifinals, and his status for the men's 4x400 relay is uncertain.

But the Americans aren't worried about possibly not having him on the relay team.

"We loaded. We've got the best 400 meter runners in the world," said Angelo Taylor.

The defending 400 hurdle champion said it reminds him of the 1996 Olympic Games.

"Michael Johnson, he goes out, breaks the world record in the 200, gets cramped and he's not ready to go run the relay. But guess what? The guys stepped up and we still won the gold. So I'm not worried at all."

— Jenna Fryer — Twitter http://twitter.com/jennafryer

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EDITOR'S NOTE — "Eyes on London" shows you the Olympics through the eyes of Associated Press journalists across the 2012 Olympic city and around the world. Follow them on Twitter where available with the handles listed after each item.