Two styles of wrestling are featured in the Olympics and will be held between September 24-October 1 at the Sydney Exhibition Center, Halls 1 and 2. Freestyle resembles high school and collegiate competition while Greco-Roman is less popular in the United States. The main difference between the two is that Greco-Roman involves only upper-body maneuvers from the standing position. Both competitions are divided into eight weight classes -- cut down from 10 each in 1996. Light flyweight and heavyweight were eliminated, leaving flyweight, bantamweight, featherweight, lightweight, welterweight, middleweight, light heavyweight and super heavyweight. A new system will be introduced in this year's Olympics as the 20 wrestlers in each class will be divided into six unseeded pools. The freestyle event is conducted in three three-minute rounds and is completed by either a fall or if one wrestler achieves a 12-point advantage. If a tie results, a sudden-death overtime period is conducted. Greco-Roman is scored and timed in the same fashion as freestyle. It was created in 19th century France and named in honor of the ancient cultures that originated modern sports.