FRENCH OPEN '17: From Agassi-Nole to US teen, what to watch

Sharapova's ranking wasn't high enough to gain direct entry into the tournament as she returns from a 15-month drug suspension, and the head of the French Tennis Federation decided not to give her a wild card.

Here is what to watch on the red clay courts of the year's second Grand Slam tournament:

Novak Djokovic has been in a slump for nearly a year (his last Grand Slam title came at the 2016 French Open, when he won his fourth major in a row) so he opted to shake things up.

Winning three clay-court tournaments in a row signaled that Rafael Nadal is back and once again a candidate to win the tournament he has dominated the way no man has dominated any Grand Slam event.

Could he win his 10th French Open championship a year after withdrawing before the third round with an injured left wrist?

Amanda Anisimova, a 15-year-old from New Jersey, became the first player born in 2001 to earn a spot in a Grand Slam main draw when she claimed the U.S. Tennis Association's wild card for the French Open.

An entire day of play was washed out, the first time that happened at the event in 16 years, and other weather-related decisions by tournament officials drew criticism from players.