PARIS -- An hour into the French Open, 2012 runner-up Sara Errani was into the second round.
The tenacious Italian beat Arantxa Rus 6-1, 6-2 Sunday in the opening match on Court Suzanne Lenglen.
Errani reached a Grand Slam final for the first time a year ago at Roland Garros, then lost to Maria Sharapova.
"Last year was an unbelievable tournament, the best tournament of my life," Errani said. "But I don't want to think about that. I just want to come here and play another tournament. I try to concentrate on my tennis, not too much about last year."
Now ranked a career-best No. 5, Errani dominated Rus from the baseline and won four games at love. Rus double-faulted seven times and lost her 13th consecutive match on the WTA Tour.
No. 14-seeded Ana Ivanovic, the 2008 champion, beat Petra Martic 6-1, 3-6, 6-3. Ivanovic improved to 30-4 in the first round of Grand Slam tournaments.
In men's play, No. 14 Milos Raonic hit 16 aces, won 32 points at the net and defeated Xavier Malisse, 6-2, 6-1, 4-6, 6-4. Malisse, ranked 56th, fell to 0-5 this year on clay.
No. 23 Kevin Anderson beat lucky loser Ilya Marchenko 6-3, 7-5, 6-4.
Serena Williams and Roger Federer were among others on the first day's schedule. Play began under cloudy skies with the temperature in the mid-50s.