By Larry Fine
NEW YORK (Reuters) - Top-seed Caroline Wozniacki overcame a late wobble to defeat German 10th seed Andrea Petkovic 6-1 7-6 on Thursday and set up a U.S. Open semi-final showdown against her role model, Serena Williams.
Coming off a titanic struggle against former U.S. Open winner Svetlana Kuznetsova in the fourth round, Wozniacki adjusted quickly after her match was shifted to Court 13 when a wet patch on Louis Armstrong Stadium court would not dry.
The 21-year-old Dane was expecting to face another stern test in the last four, where she will meet three-time U.S. Open winner Williams, who beat 17th-seeded Russian Anastasia Pavlyuchenkova 7-5 6-1.
"I'm looking forward to that match," Wozniacki said about the 29-year-old Williams, who has been sidelined most of the year due to injuries and illness.
"She's an amazing athlete and a great girl. She's a fighter just like I am on the court. I got to go out there and take my chances."
"I'm number one in the world at the moment and I've been playing well and I have had a great year."
The Dane may use the match against Williams as a measuring stick as she said the 13-time grand slam singles champion was a role model for her.
"I definitely never give up. I always fight to the last point," she said.
"Her biggest strength is definitely also her fighting spirit. She's just a great competitor, a great athlete in general. I really respect her as a tennis player, but also as a person.
"You know, both have nothing to lose. We'll just go out there, and hopefully it will be a good battle."
(Editing by John O'Brien)