* Serena needs nine match points to progress
* Djokovic into next round after Lapentti retires
By Pritha Sarkar
PARIS, May 26 (Reuters) - An almighty roar shook Roland Garros on Tuesday to mark the moment Serena Williams scrapped and clawed her way into the second round of the French Open.
The world number two was left a breathless wreck as Klara Zakopalova teased and tormented the American by saving eight match points in a theatrical display on Suzanne Lenglen Court.
After almost two-and-a-half hours of high drama, Williams finally subdued the plucky challenge of the Czech 6-3 6-7 6-4.
"I feel very disappointed. She's Serena. She's one of the biggest players here, so bad luck for the draw," warned Zakopalova. While Williams made sure she did not become the first big-name casualty in Paris, Novak Djokovic got an easy ride into the last 64 when his opponent Nicolas Lapentti hobbled off court with an ankle injury. Djokovic was leading 6-3 3-1.
Djokovic's fellow Serb Jelena Jankovic and Russian Svetlana Kuznetsova dodged rain showers to book their place in round two.
Twenty four hours after the scorching conditions in Paris had left many players hot and bothered, temperatures had dipped by more than 15 degrees Celsius after overnight thunderstorms.
Instead of using her red and white towel to wipe sweat off her face, Jankovic used it as a blanket around her shoulders in the changeovers and seemed relieved to go back to the warmth of the locker room with a 6-2 6-3 win over Czech Petra Cetkovska.
"I felt a little bit slow after the rain delay when I came back on court again. But I managed to finish the job in two sets, so I'm happy," said the fifth seed.
Kuznetsova also had to endure a two-hour rain break in the first set but she made sure she did not slip up on resumption and bamboozled French wildcard Claire Feuerstein 6-1 6-4.
By the time Williams stepped out, Roland Garros was bathed in glorious sunshine but the American soon discovered that she would not be allowed to enjoy a leisurely afternoon stroll.
28-STROKE RALLY
Zakopalova had beaten Williams in Marbella last month and clearly wanted to mete out more punishment on the 10-times grand slam champion who had not won a match on red dirt in 2009.
Trailing 5-3 in the second set, Zakopalova ignored her status as the world's 100th best player and showed nerves of steel to save five match points.
Clubbing forehand winners all over the court, Zakopalova came out on top in a 28-stroke rally which had even Williams's mum applauding from the stands. That only added to her daughter's growing frustration, especially as she ended up relinquishing the set 7-5 in the tiebreak.
Sixty two minutes after squandering her first series of match points, Williams earned another three while leading 5-2 in the decider.
These too disappeared into the gusting winds swirling around the court but three games later, Zakopalova's resolve finally cracked, leaving a jubilant Williams to bounce around as she deafened the cheering fans.
Men's fifth seed Juan Martin del Potro seemed in a hurry to finish his match before the rain returned and stamped all over French hopes in a 6-3 6-3 6-1 win over Michael Llodra.
Former Australian Open finalist Rainer Schuettler, however, wished the rain had never stopped.
Four days after being walloped 6-0 6-0 in the World Team Cup by Sweden's Robin Soderling, he had to digest some more bagels.
As the German edged close to becoming the first man since 1993 to lose a grand slam match without winning a game, he suddenly woke up to avoid the rout. He still lost 6-0 6-0 6-4 to France's Marc Gicquel.
Asked if he felt sorry for his opponent, Gicquel replied: "I wanted to try to give him three times 6-0. I didn't come here to sympathise. If I can give him three times 6-0, I will."
Djokovic could, however, sympathise with the plight of Ecuador's Lapentti's since the Serb himself retired in this Australia Open quarter-finals.
Grimacing in pain after going over on his left ankle while trailing 5-2 in the opening set, Lapentti called on the tournament trainer to strap it up but after limping around court for another six games, the 32-year-old called it quits.
Men's ninth seed Jo-Wilfried Tsonga, runner-up in Melbourne in 2008, registered his first win at his home slam with a 6-4 3-6 6-3 6-4 victory over fellow Frenchman Julien Benneteau. Eleventh seed Gael Monfils also progressed. (Editing by Sonia Oxley, To query or comment on this story email sportsfeedback@thomsonreuters.com)