French Open title hopefuls Novak Djokovic and Francesca Schiavone gave the Roland Garros crowd a glimpse only of their abilities as they sped into the second round on a hot, sunny day at tennis' second major.
Second seed Djokovic extended his winning streak to 40 matches with a 6-2 6-1 6-3 dismissal of Dutchman Thiemo de Bakker while defending champion Schiavone raced past American Melanie Oudin 6-2 6-0.
Djokovic's path ahead became less challenging after possible quarter-final opponent Tomas Berdych became the first big casualty in the men's singles.
The Czech sixth seed, a semi-finalist last year, slumped to a shock 3-6 3-6 6-2 6-2 9-7 defeat against French qualifier Stephane Robert.
Third seed Roger Federer was given a decent workout before seeing off Spaniard Feliciano Lopez 6-3 6-4 7-6.
Djokovic, who has beaten five-times French Open champion Rafael Nadal twice on clay this season, faces a possible third-round encounter with 2009 US Open champion Juan Martin del Potro.
The Argentine, who has been recovering from a torn hip muscle, recovered from a shaky start to down Croatian Ivo Karlovic 6-7 6-3 7-5 6-4.
World number one Caroline Wozniacki begins her bid for a first grand slam title when the Dane faces Japan's Kimiko Date Krumm on Court One.