For Serena Williams, it was a bad right elbow that led to some shaky serving and a dropped set.
For Novak Djokovic, first it was a balky right hip that needed treatment from a trainer; later came an embarrassing mistake.
For Andy Murray, it was a time warning from the chair umpire and losing a set for the first time in six matches against his opponent.
While nine-time French Open champion Rafael Nadal won in straight sets on a cloudy, windy Thursday, some red dirt got in the machine for three of the other biggest names at Roland Garros. That trio put those moments aside and reached the third round, where more significant challenges could await.
"I know I'm...