Juan Martin del Potro fired up his power game after a sluggish start to ease past Nicolas Jarry in an all-South American first-round clash at the French Open on Tuesday.

The eighth seed, a semifinalist last year, won 3-6, 6-2, 6-1, 6-4, the four sets taking a little more than four hours.

"The conditions were difficult at the start with wind and some rain, and Nicolas played so strong, but after that I took control of the game and played better," Argentine del Potro said on Court Suzanne Lenglen.