For some of the top men and women at the French Open, starting Sunday, the trip to Paris for the year's second Grand Slam can be over before they know it.
Going up against someone with solid clay-court credentials or a rocket serve is usually the last thing a top seed wants to face right off the bat. But that's the luck of the draw sometimes and not even Rafael Nadal or Roger Federer are immune: They're matched against big-hitting John Isner and crafty lefty Feliciano Lopez, respectively.
Nadal and Federer should be more than okay though. Following are some matchups that can go against the heralded player.