In July 2009, Petkovic won the first WTA singles title of her career at the WTA International event in Bad Gastein, Austria after a straight sets win over Romanian, Ioana Raluca Olaru in the final.[2] At the 2011 Australian Open, she defeated the 2008 champion and former World No. 1, Maria Sharapova[3] in the fourth round to reach her first Grand Slam quarterfinal where she lost in straight sets to the ninth seed and eventual runner-up, Li Na.[4] In March 2011, she reached her first Premier Mandatory semifinal at the Sony Ericsson Open, upsetting World No. 1 Caroline Wozniacki[5] and sixth seed Jelena Janković[6] en route before falling to Sharapova in three sets.[7] Two months later, she won her second career singles title at the Internationaux de Strasbourg[8] before reaching her second consecutive Grand Slam quarterfinal at the French Open where she lost to Sharapova in straight sets, winning just three games.[9] After quarterfinal and semifinal appearances at the Rogers Cup[10] and Western & Southern Open[11] respectively, Petkovic reached her third Grand Slam quarterfinal of the year at the US Open, where she lost in straight sets to the top seeded Wozniacki.[12] In October, she reached the biggest final of her career to date at the China Open where she lost to the eleventh seed, Agnieszka Radwańska in three sets.[13] Petkovic rose to a career high of World No. 9 as a result of this performance and eventually finished the year ranked World No. 10, marking her first finish in the year-end top ten.
In April 2014, Petkovic won her first WTA Premier singles title and first career title on green clay at the Family Circle Cup, defeating Jana Čepelová (who had upset World No. 1 and two-time defending champion, Serena Williams earlier in the tournament)[14] in the final.[15] It was Petkovic's first tour level singles title in three years and remains the biggest title of her career thus far. In June, Petkovic advanced to her first Grand Slam semifinal at the French Open, defeating tenth seed and 2012 finalistSara Errani[16] en route before losing to the eventual runner-up, Simona Halep in straight sets.[17] The following month, she won her second title in Bad Gastein, defeating first time finalist Shelby Rogers in straight sets.[18]
(W) winner; (F) finalist; (SF) semifinalist; (QF) quarterfinalist; (#R) rounds 4, 3, 2, 1; (RR) round-robin stage; (Q#) qualification round; (P#) preliminary round; (DNQ) did not qualify; (A) absent; (Z#) Davis/Fed Cup Zonal Group (with number indication) or (PO) play-off; (G) gold, (S) silver or (B) bronze Olympic/Paralympic medal; (NMS) not a Masters tournament; (NTI) not a Tier I tournament; (P) postponed; (NH) not held; (SR) strike rate (events won / competed); (W–L) win–loss record.
To avoid confusion and double counting, these charts are updated at the conclusion of a tournament or when the player's participation has ended.
Only Main Draw results in WTA Tour, Grand Slam Tournaments and Olympic Games are included in Win–Loss records.
2 The Dubai Tennis Championships and the Qatar Open have frequently switched their tournament status between Premier 5 and Premier events. Doha initially held Premier 5 Status, before the rights were given to Dubai between 2009 and 2010 due to the former's hosting of the WTA Championships in those years. Doha regained its Premier 5 status in 2012 due to its success in 2011, but its rights were once again given back to Dubai in 2015, with Doha having a Premier status currently.