ABC News - USA - As James Blake approaches the practice court, it's surprising that more people don't realize that one of the best tennis players in the world is walking among them.

I was at the Tennis Championships in Indianapolis on July 14, the first stop of the U.S. Open Series, and an unbelievable mecca for Midwestern tennis buffs unable to fly east for the one grand slam on American soil.

But Blake has such an unassuming air about him that he almost fits right in, even though he carries an unbelievably large tennis bag with him -- much larger than those the fans are carrying