Paris:Defending champion Ana Ivanovic shrugged off her recent injury worries to reach the French Open second round on Sunday with a gruelling 7-6 (7/3), 6-3 win over Italy's Sara Errani.
The 21-year-old, eighth-seeded Serbian will play either Thai veteran Tamarine Tanasugarn or Camille Pin of France for a place in the third round.
The bright and cheerful Ivanovic, who skipped last week's Madrid Open because of a knee injury, had the problem area taped when she walked onto Philippe Chatrier Court, but it didn't hinder her in the early exchanges as she edged to a 3-1 advantage.
The 44th-ranked Italian then stormed back to lead 5-4, but once she had squandered an opportunity to serve for the first set in the 10th game, her fight steadily melted away in the sweltering Paris sunshine.
Ivanovic eased through the tie-break and then dominated the second set, stretching out to a 5-1 lead on the back of two breaks.
She suffered a slight blip when Errani clawed one break back in the eighth game, but the champion eventually clinched victory with a swooping forehand in the ninth game after over two hours on court.
China's Li Na, the 25th seed, earlier had the honour of becoming the first player to reach the second round thanks to a 6-4, 6-2 win over Poland's Marta Domachowska.
The 26-year-old Li, who missed the 2008 tournament because of injury, needed just 72 minutes to make the last 64 where she will face Switzerland's Timea Bacsinszky.
Li was quickly joined in the next round by promising Russian 17-year-old Anastasia Pavlyuchenkova, the 27th seed, who eased past Romania's Ioana Raluca Olaru 6-3, 6-2.
Later Sunday, men's third seed Andy Murray begins his campaign against Argentina's Juan Ignacio Chela, a former quarter-finalist.
Russia's Marat Safin, a former world number one and semi-finalist here in 2002, takes on French wild card Alexandre Sidorenko while 2004 champion Gaston Gaudio faces Czech 18th seed Radek Stepanek.
Australia's former world number one Lleyton Hewitt, taking part in his 10th Roland Garros, was facing giant Croatian Ivo Karlovic who he has never beaten in three career meetings.
Karlovic famously dumped Hewitt out of the first round at Wimbledon in 2003 when the Australian was the defending champion.