Past champions Novak Djokovic and Iga Swiatek aren’t in top form as they head to Roland Garros.

For quite some time, there's usually been a sense of certainty at the French Open. That was particularly so on the men's side, with Rafael Nadal ruling over the red clay of Roland-Garros the way no one dominated any tournament in tennis history.

Questions reign in Paris with the 14-time champion’s retirement and the 4-time champion’s yearlong dry spell as the Grand Slam event gets underway Sunday.