World number two Daniil Medvedev booked his place in the French Open second round with a comfortable straight-set win over Argentine Facundo Bagnis.
US Open champion Medvedev, 26, won 6-2 6-2 6-2 against Bagnis, ranked 103rd.
The Russian former world number one reached his first quarter-final at Roland Garros last year - having lost in the first round in each of his four previous appearances in Paris.
He will meet Serb Laslo Djere or Lithuanian Ricardas Berankis next.
Bagnis, 32, immediately responded after seeing his serve broken in the opening game - but that was to prove a rare glimmer of hope on Court Suzanne Lenglen.