The rainy and cold weather which interrupted the tournament briefly on Wednesday turned better Thursday as Garcia, ranked 38th in the world, overcame her tall rival 6-3, 6-5, reports Xinhua.
The 23rd-ranked German seemed to be somewhat exhausted from previous matches and a bit unfocused. The more mistakes she made, the more she expressed her frustration visibly and audibly through negative monologues.
Garcia, aged 22 and a resident of the French city of Lyon, told Xinhua after the match that while she felt the previous matches in Dubai took a lot of energy, "this match against Petkovic was a little bit lighter and only one and half hours long, but anyway I am still young and I feel fit for the coming match."
Errani wins quarterfinal
The second quarterfinal took more than two hours as Italy's Sara Errani turned the table in the second set, winning it 6-1 against Madison Brengle after she lost the first set 6-4.
As the 25-year-old American failed to retake the initiative on the center court, Errani won the third set 6-4.
"I don't know how I turned the match, the best is not to think too much about the set but more about the next point and I always fight to win the next point, no matter what happened before," said Errani.
In a quarterfinal between Colleen "CoCo" Vandeweghe of the United States and 21st ranked Elina Svitolina of Ukraine, the latter left the court as a winner after tough three sets that lasted just short of two hours, finishing 6-4, 1-6, 6-4.
Svitolina kept the 1.85-meter-tall blonde on the run in the first and third sets. "I tried to play fast and I chased every ball. I really look forward to the semifinal against Sara Errani on Friday," said Svitolina.
Errani also won her doubles with Spain's Suarez Navarro, winning 6-3, 6-4 against Chinese duo Zheng Saisai and Xu Yifan.