Sharapova, given a wild card by the U.S. Tennis Association into her first Grand Slam tournament since a 15-month doping ban, has played all three matches on the main court.
Wozniacki, the No. 5 seed, said she thought that was a poor example following her second-round defeat Wednesday in a match that was scheduled for one outside court and eventually moved to another late in the day.
"When you look on center court, I understand completely the business side of things and everything, but someone who comes back from a drug sentence and performance-enhancing drugs and then all of a sudden gets to play every single match on center court, I think that's a questionable thing to do," Wozniacki told Ekstrabladet TV of Denmark.
Ashe is usually reserved for the top players. Sharapova is a five-time Grand Slam champion, but she is unseeded here with a ranking that has tumbled to No. 146 following her suspension.
"With regards to scheduling, as you know, I don't make the schedule," Sharapova said. "I'm a pretty big competitor. If you put me out in a parking lot of Queens in New York City, I'm happy to play there."
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