PARIS - Novak Djokovic showed glimpses of frailty along with his usual ruthless streak when he moved into the second round of the French Open with a 7-6(5) 6-4 7-5 win over Belgium's David Goffin on Tuesday. Paris's unseasonable downpours kept the world number one off court for most of the day but, after emerging into the early evening gloom, he encountered a talented shot-maker on the other side of the net. Djokovic came through the first set tie-break thanks in part to the raucous Parisian crowd, whose efforts to inspire his young opponent with an ill-timed shout of "Allez David" at 5-5 on his second serve caused the world number 58 to double fault. There was a battling quality about Goffin, who managed to break the Serb's serve in the second set and had a break point in the third before succumbing to the six-times grand slam winner. Earlier Sam Stosur waited 2 1/2 hours to play because of rain, then quickly won her opening match at the French Open. The 2010 runner-up swept the first nine games Tuesday and drubbed 42-year-old Kimiko Date-Krumm 6-0, 6-2. Matches were delayed at the start on a 55-degree afternoon, and when the rain stopped, Stosur was ready. Playing on cozy Court 1, nicknamed the bullring, Stosur dominated with her strong serve and pinpoint groundstrokes, repeatedly skipping shots just inside the lines. Shortly after Stosur finished, rain returned, prompting another interruption. “I was happy to get out there and start,” she said. “It was spitting a little bit when we went out there. You think, ‘Oh, are we going to start or are we not?' Lucky for me I was able to finish the match before this last downpour came.” Australian Bernard Tomic, whose father was barred from Roland Garros after being charged recently with assaulting his son's hitting partner, retired trailing Victor Hanescu 7-5, 7-6 (8), 2-1. Tomic was treated for a right hamstring injury after three games and limped at times during the match. American Jack Sock, a 20-year-old qualifier ranked 118th, made a successful Roland Garros debut by beating Guillermo Garcia-Lopez 6-2, 6-2, 7-5. No. 12 Tommy Haas earned his first Grand Slam victory since turning 35, beating Guillaume Rufin 7-6 (4), 6-1, 6-3. A teen also had his turn — Lucas Pouille, a 19-year-old wild card from France, defeated American Alex Kuznetsov 6-1, 7-6 (2), 6-2. No. 26 Grigor Dimitrov advanced when Alejandro Falla retired with indigestion trailing 6-4, 1-0. Frenchwoman Marion Bartoli, a semifinalist two years ago, needed more than three hours on center court to beat Olga Govortsova 7-6 (8), 4-6, 7-5. Australian Open champion Victoria Azarenka's match against Elena Vesnina was among 10 first-round matches postponed. They won't begin until at least Wednesday, three days after some players were already into the second round. Stosur, seeded No. 9, enjoyed a career breakthrough three years ago when she reached the Roland Garros final before losing to Francesca Schiavone. She won the US Open in 2011, but this year has been hampered by a right calf injury and has yet to reach a semifinal. Stosur said she's now feeling 100 percent and hoping for a good run in Paris. Date-Krumm, who won the Strasbourg doubles title last week, is the third-oldest woman to play in the French Open. When she made her Roland Garros debut in 1989, nearly half the players in this year's women's draw had not yet been born. When rain returned after 90 minutes of play, soggy fans huddled in corridors and formed long lines at the gourmet coffee stands. Last week, tournament officials said they would move ahead with plans to build a retractable roof over center court, despite a judicial ruling in March that put the project on hold. The roof would be completed in 2018 as part of a $440 million renovation project at Roland Garros. On Monday, Gael Monfils, whose career has recently been hampered by injuries, returned to the French Open with a bang to beat Czech fifth seed Tomas Berdych in a first-round marathon. Monfils, the world No. 81, prevailed 7-6, 6-4, 6-7, 6-7, 7-5 in front of an ecstatic Court Philippe Chatrier crowd after four hours three minutes. The women's defending champion, Maria Sharapova, also eased into the French Open second round with a 6-2, 6-1 win over Taiwan's Hsieh Su-Wei. The Russian second seed goes on to face Canadian teenager Eugenie Bouchard for a place in the last 32. — Agencies