To pull off an upset at Wimbledon takes a special performance by a focused player. Here are the dark horses to watch out for.
Remember when the French Open invariably yielded surprise winners (thanks, Rafa)? That might not be the case anymore, but there are a few under-the-radar players who might have something to say.
Don't know Janko Tipsarevic? If his recent form holds up in Melbourne, it's likely you soon will. He's just one of several players who appear poised to author an Aussie Open upset or two.