The 2013 U.S. Open is sure to have its share of upstarts and upsets. There are several talented tennis players who can trouble the likes of Rafael Nadal, Roger Federer and Serena Williams. This tournament, in particular, is deep and dangerous and allows greater parity between the stars and the rest.
This article will examine four players, each from the ATP and WTA, who are not top-20 players, but are capable of beating anyone on a given day. It will examine one player from each quarter of the draw.
Which sleepers can create the most nightmares in their portion of the bracket? Who will roll into the second week?