PARIS, France (AP) — Novak Djokovic’s perfect season is still intact, his winning streak is still alive and his clay-court form still looks devastating after he reached the third round of the French Open when Victor Hanescu retired yesterday because of injury.

The second-seeded Serb, who joined 2009 champion Roger Federer in the third round at Roland Garros, improved to 39-0 in 2011 after Hanescu retired while trailing, 6-4, 6-1, 2-3. Djokovic also has won 41 straight matches dating to last year’s Davis Cup final.

If he makes the final, Djokovic will be assured of the No 1 ranking in men’s tennis for the first time.

Top-ranked Caroline Wozniacki and 2010 French Open finalists Francesca Schiavone and Sam Stosur also reached to the third round, while third-seeded Vera Zvonareva had to save a match point to advance. On the men’s side, No 7 David Ferrer of Spain, No 9 Gael Monfils of France and former US Open champion Juan Martin del Potro made it through.

Djokovic, who won three clay-court tournaments leading up to Roland Garros and beat top-ranked Rafael Nadal in two of them, won seven straight games at one point and didn’t face any trouble from his Romanian opponent.

In the next round, Djokovic will face Del Potro, who defeated Blaz Kavcic of Slovenia 6-3, 6-2, 6-4.

Federer, playing an opponent who had never lost a match at the French Open, beat French wild card Maxime Teixeira, 6-3, 6-0, 6-2, to reach the third round.

Federer will next face 29th-seeded Janko Tipsarevic, who beat Pere Riba of Spain, 6-1, 6-3, 6-0. Tipsarevic took Federer to five sets in the third round of the 2008 Australian Open, eventually losing 10-8.

Ferrer advanced by beating Julien Benneteau, 6-3, 6-4, 6-2. The Spaniard has twice reached the quarter-finals at Roland Garros, in 2005 and ’08.

No 12 Mikhail Youzhny of Russia, No 13 Richard Gasquet of France, No 14 Stanislas Wawrinka of Switzerland, No 17 Jo-Wilfried Tsonga of France, No 23 Thomaz Bellucci of Brazil, No 30 Guillermo Garcia-Lopez of Spain and No 31 Sergiy Stakhovsky of Ukraine also made it through.

Zvonareva, the Wimbledon and US Open runner-up, saved a match point midway through the third set before beating an ailing Sabine Lisicki, 4-6, 7-5, 7-5.

Lisicki, a German qualifier, twice called for a trainer but continued to play. After the match, she lay on the court sobbing.

Wozniacki beat Aleksandra Wozniak of Canada, 6-3, 7-6 (6). The Dane trailed 6-3 in the tie-breaker but won the final five points, saving three set points to reach the third round.

Stosur beat Simona Halep, 6-0, 6-2; Schiavone beat Vesna Dolonts of Russia, 6-1, 6-2; No 10 Jelena Jankovic of Serbia, No 11 Marion Bartoli of France, No 13 Svetlana Kuznetsova of Russia, No 14 Anastasia Pavlyuchenkova of Russia, No 17 Julia Goerges of Germany, No 28 Daniela Hantuchova of Slovakia and No 29 Peng Shuai of China also won, while Gisela Dulko of Argentina eliminated No 32 Tsvetana Pironkova of Bulgaria.