Novak Djokovic made it to the second round of the French Open after beating Brazilian qualifier Rogerio Dutra Silva.
The former world number one went 2-0 down at the start of the first two sets but recovered to come through 6-3 6-4 6-4.
Seeded 20th at Roland Garros, Djokovic has not won a Grand Slam title since his victory in Paris in 2016.
World number 12 Djokovic said before the tournament that his confidence had been knocked after suffering a recurring elbow problem, which required surgery in January.
He returned to training in March and fell to successive first-round defeats at Indian Wells and the Miami Open.
But the 12-time Grand Slam champion reached the semi-finals of the Italian Open earlier this month and looked fairly comfortable against Dutra Silva, the world number 134.