(REUTERS) – Maria Sharapova survived a string of unforced errors to book her place in the third round of the French Open yesterday with a 6-2, 6-4 rain-delayed win against Canada’s Eugenie Bouchard

The defending champion, seeded second at Roland Garros, returned to Court Philippe Chatrier leading 6-2, 4-2 after the match had been interrupted by rain late on Thursday.
Despite Bouchard’s late fight and a total of 28 unforced errors from the Russian, Sharapova wrapped it up in 15 minutes on her first match point.
She will face China’s Zheng Jie for a last-16 spot.
Serena Williams breezed past Sorana Cirstea 6-0, 6-2, extending her winning streak to 27 matches and laying down a marker of her title potential.
It took eight games and 33 minutes before her 26th-seeded Romanian opponent made a mark on the scoreboard, a feat that was greeted with sympathetic cheers from the Parisian crowd.
The world number one broke three times in the opening set and although she found the going tougher in the second, losing two early games and facing break points, she had too much power for Cirstea.
Williams, who won her only Roland Garros title in 2002, will play Italy’s Roberta Vinci in the next round after she beat Czech Petra Cetkovska 6-1, 2-6, 6-2.
Home hope Marion Bartoli, seeded 13th, battled past Colombian qualifier Mariana Duque 7-6 (5), 7-5 to set up a third-round clash with former champion Francesca Schiavone of Italy, who edged a three-setter against Belgian 21st seed Kirsten Flipkens 6-1, 4-6, 6-3.